I think that Walt eventually would have found that a controlled futuristic city wouldn't be able to have actual people living in it and have it be a tourist attraction at the same time. The residents' lives would be completely on display. It reminds me of the movie "The Truman Show." It's about a guy that lives in this world under a dome and is constantly on TV, but he doesn't know it.
The original Epcot would make a nice movie, though. To show how advanced cities of the future could be. Maybe they could put that in Tomorrowland -Idea Spark!-
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