The annual CES convention is still popular. I see it as the modern equivalent of the world's fair, even if it is not quite the same and missing some aspects.
Is it? Half of it is every manufacturer from Shenzhen selling assorted components. The larger, prestigious booths mostly show the next iteration of consumer electronics, and there's the occasional thing that looks awesome enough for a world's fair, but is probably a mock that will never go into production.
Better parties, though.