I remember seeing the 3d scale models of arcologies at the Corcoran Art gallery sometime in the early 70's. They were beautiful, and indeed utopian. Are the model's preserved anywhere, perhaps at Arcosanti?
Some of those models are preserved in the archives at Arcosanti and Cosanti. Unfortunately many of them have been lost to the elements.
There's a lot of interesting work currently being done on bringing those models into virtual reality and even mixed reality.[1] Of course bitrot is always a thing, but hopefully these will last longer!
