Well. Thanks for an interesting dive down Wikipedia.
Last World's Fair I could remember of merit was Expo '86; probably because it was the last one anywhere near anything close (and I saw Front Line Assembly play in a forum built for it in '97). I thought we were done with that. Turns out, anything but - it's just that it hasn't been anywhere near the US since, well, '86. And why the hell not? Oh, right, George W Bush:
Kinda funny. Some stuff is right on. Some stuff is left field. Kind of Asimov in general - he got psychology but the engineering stuff was kind of over his head a lot of the time. Even he didn't predict that we'd stop wondering.