I have often thought that motivation would be erased if living forever became the norm. I mean, why do anything at all??? Now, we are motivated often due to time. "I'll do it tomorrow" could always be an excuse, because there is always a tomorrow, for sure.
this is how i feel. if humans could live forever (shoot, even just 100 extra years) the world would be an over-populated, underfed, impoverished (moreso, i mean) place. life would be terrible. even if we developed better technology, societies would still crumble economically. the rich would get richer and the poor poorer.
we wouldn't be exploring the world and enjoying retirement. there would be no retirement, we would work in some capacity forever. we would all be living in tiny cubicle like apartments (remember 5th element? like that). plus, what would we do with all the waste and garbage? we couldn't even shoot it off into space as quickly as we make it. life would suck.
i'll take my 70 or so years with life like it is. screw living forever. that would be terrible.