MineCraft on Xbox 360?!

At E3 on Monday, Microsoft announced that MineCraft would be coming out on Xbox 360 sometime near the end of the year. Normally I wouldn't care, but a couple specifics caught my eye:

• cross-platform functionality between 360 and PC
• Kinect support

I can't help but wonder why bother including Kinect support, other than to add a bulletpoint. It doesn't seem like the kind of game that would be improved at all by marching in place, flailing your arms, and/or saying "inventory" aloud vs. using a controller. Whatever cross-platform features are implemented should be more interesting... and ACHIEVEMENTS!