Hi Mike,
I was 11 when we went to the World's Fair in NY in 1965. I well remember GE Progressland. I can't remember if the stage rotated or the audience!lol I do remember looking at the exhibits of appliances after the show was over. They showed a GE wall oven all dirty; closed the door and a few seconds later, presto, the oven was clean! I, too, thought Americana was a late 60's moniker. I do remember getting an Americana portable dishwasher from a friend. It had cycle adjustments for wash time, cycle selection, rinse time, AND dry time! The ultimate in choices, but alas, the same old crappy bottom rack and tower to deal with!