Yeah, that solves the price issue maybe, but it doesn't solve the space issue for Motion VR. Even in quite expensive houses, you're still going to be moving furniture to play a game. It just doesn't have the same ease of use of sitting back on a couch playing with a controller. I just can't see Motion VR growing beyond a niche market anytime soon.
The best idea I've heard so far is VR arcades, that would be fun.