Y'all do realize that Carousel of Progress, along with Its A Small World and Great Moments with Mr. Lincoln were developed by Walt Disney for the 1964 / 65 New York World's Fair. Walt actually used these 3 original "attractions" to gauge the right coast's acceptance of an east coast
Disneyland type experience. The 3 Disney shows were smash hits in New York (and you know what they say...if you can make it there...) Shortly after the overwhelming public reception of COP, IASM, and GMWML land was being bought up in central Florida.
So you see, the COP is the spark that ignited the development of Walt Disney World. It is Walt at his best IMO. I hope it has many more great big beautiful tomorrows!