It looks cool and I am very interested in getting it. I want to know more details though. Seems like there is a lot that could go wrong. For example, how does it handle carpet? How does it hold up over time? I guess I want to see some reviews of the actual product. But the idea has me very intrigued.
To me this is more what gaming is really about: finding ways to push the envelope. Gaming has gotten too stale. This is not stale. I like how it's a real kart interacting with the Switch. The whole idea seems very fun and innovative.