The challenge of innovation is to see the possibilities. That's what makes it hard; anyone can see potential flaws - if that's what it took everyone would do it. I'd much prefer that we focus on the former.
It's a commercial-like video to attract attention - but fair enough if it doesn't impress you. It's hard for me to judge UI without using it myself.
It's cool that they're at least trying to solve the problem of a better UI because I believe that's a problem that exists. It reminds me of one of Brett Victor's talks.