That's also the only thing that keeps our population in check.
Let's see how we handle the incoming retirement issues, that'll give us a good indication (less workers, more retired people pretty much everywhere in the west, peaking in the next few decades).
Living long won't help much if it just means more people consuming our limited natural resources and weighting on our social infrastructure. At any rate most country would shift their retirement age accordingly and life would be the same but longer, I fail to see the appeal of that (albeit it's the ultimate realization of our "us vs nature" western mentality)
We should figure how to live well before we try to live longer, and we still have some things we're nowhere close to figure out (energy, pollution, retirement, increasing pop, &c.)
But all of that only applies if everyone has access to this tech, which I doubt. Most likely it will be a "cure" for the rich.
Seems to me that scientists are working toward goals that kind of look nice on paper (curing aging, genetic modifications, &c.) without stopping even one second and thinking about the moral/social/economical consequences down the line.