Ok, I watched the video two times and cant see why? You can make games using your enviorment and see how furniture fits your home. And then what? What is the idea? What is the purpose?
Great reason to pan something new. I'm sure some caveman said the same thing about the wheel. So it rolls down a hill. And then what?
No doubt someone said the same about a transistor, and laser beams, and nuclear fission, and photographic film, x-ray technology, and about a thousand other new ideas.
Hey, that's great, Mr. Babbage. You made a machine that adds things. A "computer". So what? What are you gonna do with it?
Great thing about new inventions, sometimes they're just a little bit ahead of their time. Thats ok. Most of us like new fresh ideas. The possibilities truly are endless.