I mean, it's been improving for billions of humans for centuries, and stands to accelerate even more with all the downstream effects of eliminating aging.

Are you thinking mostly that the decline in population growth may reverse? From the traffic remark that's what I'm assuming.

Don't think that's very clearly true, though. Birth rates have been so strongly correlated with death rates over time... There's a lag in birth rates catching up when death rates drop, as we've seen in the African nations booming for instance, but catch up they do. Faster with higher standards of living.