The idea of nanotech-induced immortality a la Ray Kurzweil is deluded entrenchment par excellence. Let's play around with this idea for a second, Gedankenexperiment-style. First of all, the exponential is Kurzweil's Philosopher's Stone. That being the case, I'm sure the fact of exponential population growth doesn't elude him. Can everyone become immortal? Well, that would be unfeasible and unsustainable for obvious reasons. And what if sociopaths become immortal? What if those who believe that humans dominate nature become immortal? What if the poor and homeless become immortal?
With this kind of Steampunk materialist thinking, it would-and-could never be the case that all would enjoy the privilege. If billions in the world cannot afford medicine, the nano-elixir of immortality would be beyond their range of affordability. That is, it would be too fucking expensive for most of the earthly population. So while the poor will croak as nature intended them to do, those with wealth first, and those with power next, shall ascend to the halls of the gods. And perhaps they will inject their soldiers with the serum, to have an army of immortal soldiers. This is the problem with the quantitative, realist (epistemologically-ontologically speaking), materialist paradigm.
Technology must serve all, and serve well, and accord well with the needs of living beings and their living planet. Immortality is a qualitative value, of eventual actualization and interweaving with reality-as-such. It is achievable at any moment. In the meantime, there's nothing to be done, and nothing to do but wake up. The all-embracing body of the originally-existent conscious universe won't stand for a quantitatively immortal dystopia. The Choronzon nature of reality always, in all eventuality, arises with the Dark Energy of Dispersion to test the mettle of these kinds of outdated thoughts from outdated paradigms.