Parts of Tomorrowland were filmed at It's a Small World in Disneyland and at the Carousel of Progress in Disneyworld. Both of those rides debuted at the NYC World's Fair.
By the way, the portions filmed in Carousel of Progress in Walt Disney World were NOT used in the film. I saw an advanced showing of the movie last night.
It's not that good of a movie by the way... I was pretty disappointed.
Oh it's great for kids under 14.... they will love it and it will inspire them. But just as a movie in general, it wasn't well done. Some parts are enjoyable, but most of the audience left feeling somewhat let down.
Yes some plate photography was completed in the Disney parks but most of the movie was shot in Vancouver. I would definitely go see it in the theatre for the amazing visuals alone.