This is just beautiful to behold.
Found these on Youtube. They are what (in part) inspired the TV show “Futurama”. They are perfect inspiration if you want to create an alternate history or a pastiche.
Futurama, General Motors 1939 World’s Fair Exhibit
Update, 2020-01-19: Seems the videos are no longer available. Here’s a replacement:
1964 – 1965 NY World’s Fair FUTURAMA II Ride Video
By random chance I came across Life after People on local TV tonight – the 2h original version, not the series. While it is hardly perfect – Wikipedia lists some criticisms or omissions, and I can come up with several more – it is still an inspirational film and a good idea to watch if you’re into post-apocalyptic fiction / gaming.