The 1964 film A Ballad for the Fair gives a tour of the 1964 New York World's Fair, with a heavy emphasis on communications technology. Produced by Bell System, you are even treated to a taste of the Bell System ride. You can watch the entire film below or just check out the futurism aspects at Paleo-Future.
And did we mention the folk singing? Oh, the folk singing!
The DVD set 1964 World's Fair at Extinct Attractions contains the film.