The 1964 World's Fair had a similar GM exhibit, but almost none of it happened. Undersea cities. Large space stations. Moon colonies. Moving sidewalks.[2] No.
Shanghai 2010 was the biggest world's fair. [3]
[1] https://archive.org/details/ToNewHor1940 [2] https://www.youtube.com/watch?v=2-5aK0H05jk [3] https://www.youtube.com/watch?v=BX_Wsh3MUpk