All this human condition nonsense will dissapear relatively soon (for the rich, obviously). They will die from: accidents, infection, injury, etc... but not from gradual physical degeneration, just like other species who doesn't age (some aligators, some fish, some turtles, some birds.. They die from anything except getting old, because they simply... doesn't show any signs of aging. Evolution was very kind for them. A perfectly adapted species, who at some point did not have any external dangers, predators, etc.. so natural selection was working on their mollecular mechanisms that keep organism in a youth phenotype, a perpetual state of perfectly working reproduction system).