At my local Microsoft store they have the HTC Vive demo stations and they're nice, but it takes up a whole corner of the store. In a Gamestop that would translate to maybe a third of the average store. Like everyone's said so far, the stores are too small. To make room for the demo stations they'd have to take a lot of product off the floor and that might add to overall cost. But it would be cool, I'd go try it out if it existed.