What is something that's crazier than the wildest dreams of any ~1970s nerd, but exists today? I'll start with an easy one:
(lemmy.world)
We got most of the tech from the jetsons ppl could envision in the early 1960s (video calls, smartphones, smart watches, smart homes), but still don't have flying cars, cloud cities, robot maids, and moving sidewalks going everywhere.