I remember it even though I'm not much of a gamer.
Other people have said it better than I, but I guess it bears repeating. Part of the problem with Future World in Epcot, as well as to a degree Tomorrowland in MK, is that by the time they build what the future's going to look like in those lands, they're already to a degree antiquated. You walk around with a device in your pocket that is a technological marvel...no, your other pocket, where your phone is (and no I don't want to know what you use that other thing for). Kids are playing games and watching movies and listening what they want to listen to in their own little queue of 1, we're pulling them out of a world they already immerse themselves into in order to immerse themselves into a theme park world. Worse, that theme park world often contains a (hold on, I'm about to throw up in my mouth a little) message, something they don't want in their entertainment. And if they do want a message, they're probably at WDW against their will. My household doesn't yet have a video game system and what tablet games the kids play are very simple and benign, so they go batpoop crazy at the things they can do after Spaceship Earth, and used to run around like maniacs in the Imagination pavilion. That's all a good time for them. They have instant access to see the newest and most innovative anything, they have virtual queues of the things they want that they know are coming, so the idea of building and maintaining a pavilion to showcase these technologies...as far as they're concerned, why bother?
But that only adds to the frustration of "what do we do with this real estate?"