We killed time on a long car journey yesterday idly speculating about this. If you think back to how the world looked in 1980 - and how it looks now.
My DD (15) was very pessimistic - no antibiotics, species deaths etc. My DH was much more optimistic in some ways - eg better genetics to tackle diseases. I thought the trains might be a bit faster! Actually I'm pretty pessimistic politically, but more interesting to hear what others think. This feels like one of those "turning points".