Although FortressCraft has been doing well on the indie marketplace, I can imagine that this will sell very well. I’m not sure how the controls will work out, but Notch had this to say:
“You will be able to play it without Kinect BUT WITH THE POWER OF KINECT YOU WILL FEEL CLOSER TO YOUR GAME THAN EVAR BEFORE AND ALSO IT SAVES KITTENS”
It’s probably best to wait and see.
Check out the teaser trailer by Mojang: