After all the mediocre Kinect stuff Microsoft showed at their press conference, this actually looks like it could quite fun!
I don't own a Kinect, but this looks like it'd be the first game I get for it. Love Fruit Ninja on my iPod and hopefully the fluid controls translate well on the Kinect. I think that these are the type of games that would work best with the Kinect. I think it'd be interesting to see if other iOS games appear on the Kinect soon.