I just wrote a bit of a comment on this idea but I have an honest question of if we can even consider cybernetic immortality..."humane" if thats the right way to put it.
Once we leave our bodies to enter a virtual system how do you guys figure we would still retain our humanity. Something as simple as fear plays into everyday decisions and emotions, unless we recreate artificial systems to interpret a fear response, leading to chemical release, and so on and so forth, it'll be a hollowing process.
TLDR; My best bet is we live semi-dead in metabolic chambers with augmented reality rigs. Still alive and flesh-bound, but with a veryyyyyyy extended lifespan.
RE: Can We Surpass The Natural Age Limit?