"We are a long way away from working around telomeres and senesence. The mechanisms leading to aging are same mechanisms preventing unchecked growth (ie cancer.)"
Absolutely true, but think of it this way (in lovely run-on form); we are doing extensive research on cancer and on the genetic elements of sensence, and it's (pardon the pun) the Holy Grail of biological research, and there is a decent, albiet currently unknown, chance that, if you did solve the telomere issue, you would simultaneous solve a number of the other degenerative aspects of advanced age, though almost certainly not all of them.
I mean, if we young adults can make it to, say, 2050 or 2075, I think there's a good chance that by then people will be at least trying to extend life far beyond what seems possible now.
And you can always freeze yourself and pray for really really good nanotech someday.