They're two very different ideas, even if they're often shared by the same people.
The singularity is all about AI surpassing human intelligence. On this front, I can tell you after having studied a lot of AI for the past three years, we are not close. We're a lot further than many people think, but still not quite that far.
As for extending lifespans, this is something we've been doing from the dawn of medicine. We've been making significant strides here for thousands of years, and as Aubrey DeGray puts it, we've become very efficient mechanics on the car that is the human body, and we're only getting better at it. There's a lot of research being done on slowing the aging process and beating genetic disorders, which are two of the largest barriers to extremely long lifespans for humans.
I agree with your premise. I too am skeptical of a singularity although I am hopeful of at least a Feline level of intelligence within the next decade. But the way these things go, the space of ideas is probably non-euclidean and certainly very high dimensional. It is possible that in the dimensions we are used to looking at things a singularity seems far away but is actually right smack in front of us in another dimension. So I remain agnostic.
Note also that - at least as far as I am aware - we have not managed to extend lifespans. Erastothenes for example lived till 82, at or more than the current expected lifespan of many western and first world countries. We have only increase the probability of arriving near the maximum life span by dealing with famine, war, diseases and optimizing diets and nutrients and lifestyle.
Well, we've increased average lifespans significantly, which matters to a great many people more than if .001% lived to age 200.
That said, is there any way to know if we've increased the maximum lifespan? It seems that accurate birth-date records in many parts of the world didn't start until the 1900s, as there's even difficulty 'verifying' the oldest person in the world today.
You're probably right that on the top end we haven't seen a ton of progress though, I think that first we have beat the things that tend to kill you in old age (cancers!) before we'll start dumping major resources into actually preventing the damage from aging itself that causes us to top out a little after 100.
Hopefully we'll also manage to reap an affordable vaccine or cure for malaria and some of the nasty diseases of tropical poverty in the next 20 years too, which will help that average skyrocket even more.
Has anyone considered the idea that perhaps this "AI" has already arrived in the form of the collective intelligence of the Internet? That perhaps the "Singularity" is simply a shift of scope in terms of consciousness from the individual to the group? Much like multicellular organisms evolving from single-celled creatures?
I just think this makes a lot more sense than the whole "we will build a conscious robot" thing, especially since many of the innovations that are used as evidence of an approaching singularity have helped human beings become ever more tightly interconnected.
This isn't quite the feedback loop that the AI singularity folks talk about, but the Internet is one heck of a positive feedback loop, much much tighter than technological progress feedback loop before it. Makes me excited for where we'll be 5, 10, 20 years from now as the rate of acceleration speeds up.
I don't think this started with the internet; the internet just made collective consciousness vastly more efficient. Just as information is processed algorithmically within the brain, information also passes from person to person via language, print, technological invention, etc.
We all want to believe that our consciousness is fully independent, but it's pretty hard to separate from our memetic history. Perhaps someday we'll be able to wire our brains together physically via wetware, and our philosophical questions about individually will take on a whole new level of complexity.
> The singularity is all about AI surpassing human intelligence.
This is a common misunderstanding. According to Kurzweil's timeline, AI surpassing human intelligence is only a stepping stone to the singularity, the former happening around 2029, the latter around 2045.
Rather, the singularity refers to the point at which the exponential slope representing technological progress begins to approach infinity. What this mathematical model means for reality is anybody's guess, and the majority of the predictions that have been made are pure conjecture.
To me, the name actually seems like a better fit for Vinge's or Good/Yudkowsky's predictions than Kurzweil's. They both have specific "singularity" points, while Kurzweil's "singularity" is just an ever-growing exponential (or super-exponential).
The singularity is all about AI surpassing human intelligence. On this front, I can tell you after having studied a lot of AI for the past three years, we are not close. We're a lot further than many people think, but still not quite that far.
As for extending lifespans, this is something we've been doing from the dawn of medicine. We've been making significant strides here for thousands of years, and as Aubrey DeGray puts it, we've become very efficient mechanics on the car that is the human body, and we're only getting better at it. There's a lot of research being done on slowing the aging process and beating genetic disorders, which are two of the largest barriers to extremely long lifespans for humans.