In response to the Quora question Looking 1000 years into the future and assuming the human race is doing well, what will society be like?, David Pearce wrote:

The history of futurology to date makes sobering reading. Prophecies tend to reveal more about the emotional and intellectual limitations of the author than the future. […]
But here goes…

Year 3000

1) Superhuman bliss.

Mastery of our reward circuitry promises a future of superhuman bliss – gradients of genetically engineered well-being orders of magnitude richer than today’s “peak experiences”.
Superhappiness?
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3274778/

2) Eternal youth.

More strictly, indefinitely extended youth and effectively unlimited lifespans. Transhumans, humans and their nonhuman animal companions don’t grow old and perish. Automated off-world backups allow restoration and “respawning” in case of catastrophic accidents. “Aging” exists only in the medical archives.
SENS Research Foundation – Wikipedia

3) Full-spectrum superintelligences.

A flourishing ecology of sentient nonbiological quantum computers, hyperintelligent digital zombies and full-spectrum transhuman “cyborgs” has radiated across the Solar System. Neurochipping makes superintelligence all-pervasive. The universe seems inherently friendly: ubiquitous AI underpins the illusion that reality conspires to help us.
Superintelligence: Paths, Dangers, Strategies – Wikipedia
Artificial Intelligence @ MIRI
Kurzweil Accelerating Intelligence
Supersentience

4) Immersive VR.

“Magic” rules. “Augmented reality” of earlier centuries has been largely superseded by hyperreal virtual worlds with laws, dimensions, avatars and narrative structures wildly different from ancestral consensus reality. Selection pressure in the basement makes complete escape into virtual paradises infeasible. For the most part, infrastructure maintenance in basement reality has been delegated to zombie AI.
Augmented reality – Wikipedia
Virtual reality – Wikipedia

5) Transhuman psychedelia / novel state spaces of consciousness.

Analogues of cognition, volition and emotion as conceived by humans have been selectively retained, though with a richer phenomenology than our thin logico-linguistic thought. Other fundamental categories of mind have been discovered via genetic tinkering and pharmacological experiment. Such novel faculties are intelligently harnessed in the transhuman CNS. However, the ordinary waking consciousness of Darwinian life has been replaced by state-spaces of mind physiologically inconceivable to Homo sapiens. Gene-editing tools have opened up modes of consciousness that make the weirdest human DMT trip akin to watching paint dry. These disparate states-spaces of consciousness do share one property: they are generically blissful. “Bad trips” as undergone by human psychonauts are physically impossible because in the year 3000 the molecular signature of experience below “hedonic zero” is missing.
ShulginResearch.org
Qualia Computing

6) Supersentience / ultra-high intensity experience.

The intensity of everyday experience surpasses today’s human imagination. Size doesn’t matter to digital data-processing, but bigger brains with reprogrammed, net-enabled neurons and richer synaptic connectivity can exceed the maximum sentience of small, simple, solipsistic mind-brains shackled by the constraints of the human birth-canal. The theoretical upper limits to phenomenally bound mega-minds, and the ultimate intensity of experience, remain unclear. Intuitively, humans have a dimmer-switch model of consciousness – with e.g. ants and worms subsisting with minimal consciousness and humans at the pinnacle of the Great Chain of Being. Yet Darwinian humans may resemble sleepwalkers compared to our fourth-millennium successors. Today we say we’re “awake”, but mankind doesn’t understand what “posthuman intensity of experience” really means.
What earthly animal comes closest to human levels of sentience?

7) Reversible mind-melding.

Early in the twenty-first century, perhaps the only people who know what it’s like even partially to share a mind are the conjoined Hogan sisters. Tatiana and Krista Hogan share a thalamic bridge. Even mirror-touch synaesthetes can’t literally experience the pains and pleasures of other sentient beings. But in the year 3000, cross-species mind-melding technologies – for instance, sophisticated analogues of reversible thalamic bridges – and digital analogs of telepathy have led to a revolution in both ethics and decision-theoretic rationality.
Could Conjoined Twins Share a Mind?
Mirror-touch synesthesia – Wikipedia
Ecstasy : Utopian Pharmacology

8) The Anti-Speciesist Revolution / worldwide veganism/invitrotarianism.

Factory-farms, slaughterhouses and other Darwinian crimes against sentience have passed into the dustbin of history. Omnipresent AI cares for the vulnerable via “high-tech Jainism”. The Anti-Speciesist Revolution has made arbitrary prejudice against other sentient beings on grounds of species membership as perversely unthinkable as discrimination on grounds of ethnic group. Sentience is valued more than sapience, the prerogative of classical digital zombies (“robots”).
What is High-tech Jainism?
The Antispeciesist Revolution
‘Speciesism: Why It Is Wrong and the Implications of Rejecting It’

9) Programmable biospheres.

Sentient beings help rather than harm each other. The successors of today’s primitive CRISPR genome-editing and synthetic gene drive technologies have reworked the global ecosystem. Darwinian life was nasty, brutish and short. Extreme violence and useless suffering were endemic. In the year 3000, fertility regulation via cross-species immunocontraception has replaced predation, starvation and disease to regulate ecologically sustainable population sizes in utopian “wildlife parks”. The free-living descendants of “charismatic mega-fauna” graze happily with neo-dinosaurs, self-replicating nanobots, and newly minted exotica in surreal garden of edens. Every cubic metre of the biosphere is accessible to benign supervision – “nanny AI” for humble minds who haven’t been neurochipped for superintelligence. Other idyllic biospheres in the Solar System have been programmed from scratch.
CRISPR – Wikipedia
Genetically designing a happy biosphere
Our Biotech Future

10) The formalism of the TOE is known.
(details omitted: does Quora support LaTeX?)

Dirac recognised the superposition principle as the fundamental principle of quantum mechanics. Wavefunction monists believe the superposition principle holds the key to reality itself. However – barring the epoch-making discovery of a cosmic Rosetta stone – the implications of some of the more interesting solutions of the master equation for subjective experience are still unknown.
Theory of everything – Wikipedia
M-theory – Wikipedia
Why does the universe exist? Why is there something rather than nothing?
Amazon.com: The Wave Function: Essays on the Metaphysics of Quantum Mechanics (9780199790548): Alyssa Ney, David Z Albert: Books

11) The Hard Problem of consciousness is solved.

The Hard Problem of consciousness was long reckoned insoluble. The Standard Model in physics from which (almost) all else springs was a bit of a mess but stunningly empirically successful at sub-Planckian energy regimes. How could physicalism and the ontological unity of science be reconciled with the existence, classically impossible binding, causal-functional efficacy and diverse palette of phenomenal experience? Mankind’s best theory of the world was inconsistent with one’s own existence, a significant shortcoming. However, all classical- and quantum-mind conjectures with predictive power had been empirically falsified by 3000 – with one exception.
Physicalism – Wikipedia
Quantum Darwinism – Wikipedia
Consciousness (Stanford Encyclopedia of Philosophy)
Hard problem of consciousness – Wikipedia
Integrated information theory – Wikipedia
Principia Qualia
Dualism – Wikipedia
New mysterianism – Wikipedia
Quantum mind – Wikipedia

[Which theory is most promising? As with the TOE, you’ll forgive me for skipping the details. In any case, my ideas are probably too idiosyncratic to be of wider interest, but for anyone curious: What is the Quantum Mind?]

12) The Meaning of Life resolved.

Everyday life is charged with a profound sense of meaning and significance. Everyone feels valuable and valued. Contrast the way twenty-first century depressives typically found life empty, absurd or meaningless; and how even “healthy” normals were sometimes racked by existential angst. Or conversely, compare how people with bipolar disorder experienced megalomania and messianic delusions when uncontrollably manic. Hyperthymic civilization in the year 3000 records no such pathologies of mind or deficits in meaning. Genetically preprogrammed gradients of invincible bliss ensure that all sentient beings find life self-intimatingly valuable. Transhumans love themselves, love life, and love each other.
https://www.transhumanism.com/

13) Beautiful new emotions.

Nasty human emotions have been retired – with or without the recruitment of functional analogs to play their former computational role. Novel emotions have been biologically synthesised and their “raw feels” encephalised and integrated into the CNS. All emotion is beautiful. The pleasure axis has replaced the pleasure-pain axis as the engine of civilised life.
An information-theoretic perspective on life in Heaven

14) Effectively unlimited material abundance / molecular nanotechnology.

Status goods long persisted in basement reality, as did relics of the cash nexus on the blockchain. Yet in a world where both computational resources and the substrates of pure bliss aren’t rationed, such ugly evolutionary hangovers first withered, then died.
http://metamodern.com/about-the-author/
Blockchain – Wikipedia

15) Posthuman aesthetics / superhuman beauty.

The molecular signatures of aesthetic experience have been identified, purified and overexpressed. Life is saturated with superhuman beauty. What passed for “Great Art” in the Darwinian era is no more impressive than year 2000 humans might judge, say, a child’s painting by numbers or Paleolithic daubings and early caveporn. Nonetheless, critical discernment is retained. Transhumans are blissful but not “blissed out” – or not all of them at any rate.
Art – Wikipedia
http://www.sciencemag.org/news/2009/05/earliest-pornography

16) Gender transformation.

Like gills or a tail, “gender” in the human sense is a thing of the past. We might call some transhuman minds hyper-masculine (the “ultrahigh AQ” hyper-systematisers), others hyperfeminine (“ultralow AQ” hyper-empathisers), but transhuman cognitive styles transcend such crude dichotomies, and can be shifted almost at will via embedded AI. Many transhumans are asexual, others pan-sexual, a few hypersexual, others just sexually inquisitive. “The degree and kind of a man’s sexuality reach up into the ultimate pinnacle of his spirit”, said Nietzsche – which leads to (17).

Object Sexuality – Wikipedia
Empathizing & Systematizing Theory – Wikipedia
https://www.livescience.com/2094-homosexuality-turned-fruit-flies.html
https://www.wired.com/2001/12/aqtest/

17) Physical superhealth.

In 3000, everyone feels physically and psychologically “better than well”. Darwinian pathologies of the flesh such as fatigue, the “leaden paralysis” of chronic depressives, and bodily malaise of any kind are inconceivable. The (comparatively) benign “low pain” alleles of the SCN9A gene that replaced their nastier ancestral cousins have been superseded by AI-based nociception with optional manual overrides. Multi-sensory bodily “superpowers” are the norm. Everyone loves their body-images in virtual and basement reality alike. Morphological freedom is effectively unbounded. Awesome robolovers, nights of superhuman sensual passion, 48-hour whole-body orgasms, and sexual practices that might raise eyebrows among prudish Darwinians have multiplied. Yet life isn’t a perpetual orgy. Academic subcultures pursue analogues of Mill’s “higher pleasures”. Paradise engineering has become a rigorous discipline. That said, a lot of transhumans are hedonists who essentially want to have superhuman fun. And why not?
https://www.wired.com/2017/04/the-cure-for-pain/
http://io9.gizmodo.com/5946914/should-we-eliminate-the-human-ability-to-feel-pain
http://www.bbc.com/future/story/20140321-orgasms-at-the-push-of-a-button

18) World government.

Routine policy decisions in basement reality have been offloaded to ultra-intelligent zombie AI. The quasi-psychopathic relationships of Darwinian life – not least the zero-sum primate status-games of the African savannah – are ancient history. Some conflict-resolution procedures previously off-loaded to AI have been superseded by diplomatic “mind-melds”. In the words of Henry Wadsworth Longfellow, “If we could read the secret history of our enemies, we should find in each man’s life sorrow and suffering enough to disarm all hostility.” Our descendants have windows into each other’s souls, so to speak.

19) Historical amnesia.

The world’s last experience below “hedonic zero” marked a major evolutionary transition in the evolutionary development of life. In 3000, the nature of sub-zero states below Sidgwick’s “natural watershed” isn’t understood except by analogy: some kind of phase transition in consciousness below life’s lowest hedonic floor – a hedonic floor that is being genetically ratcheted upwards as life becomes ever more wonderful. Transhumans are hyper-empathetic. They get off on each other’s joys. Yet paradoxically, transhuman mental superhealth depends on biological immunity to true comprehension of the nasty stuff elsewhere in the universal wavefunction that even mature superintelligence is impotent to change. Maybe the nature of e.g. Darwinian life, and the minds of malaise-ridden primitives in inaccessible Everett branches, doesn’t seem any more interesting than we find books on the Dark Ages. Negative utilitarianism, if it were conceivable, might be viewed as a depressive psychosis. “Life is suffering”, said Gautama Buddha, but fourth millennials feel in the roots of their being that Life is bliss.
Invincible ignorance? Perhaps.
Negative Utilitarianism – Wikipedia

20) Super-spirituality.

A tough one to predict. But neuroscience can soon identify the molecular signatures of spiritual experience, refine them, and massively amplify their molecular substrates. Perhaps some fourth millennials enjoy lifelong spiritual ecstasies beyond the mystical epiphanies of temporal-lobe epileptics. Secular rationalists don’t know what we’re missing.
https://www.newscientist.com/article/mg22129531-000-ecstatic-epilepsy-how-seizures-can-be-bliss/

21) The Reproductive Revolution.
Reproduction is uncommon in a post-aging society. Most transhumans originate as extra-uterine “designer babies”. The reckless genetic experimentation of sexual reproduction had long seemed irresponsible. Old habits still died hard. By year 3000, the genetic crapshoot of Darwinian life has finally been replaced by precision-engineered sentience. Early critics of “eugenics” and a “Brave New World” have discovered by experience that a “triple S” civilisation of superhappiness, superlongevity and superintelligence isn’t as bad as they supposed.
https://www.reproductive-revolution.com/
https://www.huxley.net/

22) Globish (“English Plus”).

Automated real-time translation has been superseded by a common tongue – Globish – spoken, written or “telepathically” communicated. Partial translation manuals for mutually alien state-spaces of consciousness exist, but – as twentieth century Kuhnians would have put it – such state-spaces tend to be incommensurable and their concepts state-specific. Compare how poorly lucid dreamers can communicate with “awake” humans. Many Darwinian terms and concepts are effectively obsolete. In their place, active transhumanist vocabularies of millions of words are common. “Basic Globish” is used for communication with humble minds, i.e. human and nonhuman animals who haven’t been fully uplifted.
Incommensurability – SEoP
Uplift (science_fiction) – Wikipedia

23) Plans for Galactic colonization.

Terraforming and 3D-bioprinting of post-Darwinian life on nearby solar systems is proceeding apace. Vacant ecological niches tend to get filled. In earlier centuries, a synthesis of cryonics, crude reward pathway enhancements and immersive VR software, combined with revolutionary breakthroughs in rocket propulsion, led to the launch of primitive manned starships. Several are still starbound. Some transhuman utilitarian ethicists and policy-makers favour creating a utilitronium shockwave beyond the pale of civilisation to convert matter and energy into pure pleasure. Year 3000 bioconservatives focus on promoting life animated by gradients of superintelligent bliss. Yet no one objects to pure “hedonium” replacing unprogrammed matter.
Interstellar Travel – Wikipedia
Utilitarianism – Wikipedia

24) The momentous “unknown unknown”.

If you read a text and the author’s last words are “and then I woke up”, everything you’ve read must be interpreted in a new light – semantic holism with a vengeance. By the year 3000, some earth-shattering revelation may have changed everything – some fundamental background assumption of earlier centuries has been overturned that might not have been explicitly represented in our conceptual scheme. If it exists, then I’ve no inkling what this “unknown unknown” might be, unless it lies hidden in the untapped subjective properties of matter and energy. Christian readers might interject “The Second Coming”. Learning the Simulation Hypothesis were true would be a secular example of such a revelation. Some believers in an AI “Intelligence Explosion” speak delphically of “The Singularity”. Whatever – Shakespeare made the point more poetically, “There are more things in heaven and earth, Horatio, Than are dreamt of in your philosophy”.

As it stands, yes, (24) is almost vacuous. Yet compare how the philosophers of classical antiquity who came closest to recognising their predicament weren’t intellectual titans like Plato or Aristotle, but instead the radical sceptics. The sceptics guessed they were ignorant in ways that transcended the capacity of their conceptual scheme to articulate. By the lights of the fourth millennium, what I’m writing, and what you’re reading, may be stultified by something that humans don’t know and can’t express.
Ancient Skepticism – SEoP

**********************************************************************

OK, twenty-four predictions! Successful prophets tend to locate salvation or doom within the credible lifetime of their intended audience. The questioner asks about life in the year 3000 rather than, say, a Kurzweilian 2045. In my view, everyone reading this text will grow old and die before the predictions of this answer are realised or confounded – with one possible complication.

Opt-out cryonics and opt-in cryothanasia are feasible long before the conquest of aging. Visiting grandpa in the cryonics facility can turn death into an event in life. I’m not convinced that posthuman superintelligence will reckon that Darwinian malware should be revived in any shape or form. Yet if you want to wake up one morning in posthuman paradise – and I do see the appeal – then options exist:
http://www.alcor.org/

********************************************************************
p.s. I’m curious about the credence (if any) the reader would assign to the scenarios listed here.