Minecraft is one of those oh-so-rare success stories in which a guy with an idea took on his own marketing and created a sandbox title that people genuinely wanted to play. Minecraft has gotten to the point where it is being ported to XBox 360.
Minecraft will be using the Kinect to help you build your world, punch your trees, and fend off the Creeper hordes in a giant grandiose sandbox.
The plan with doesn't involve any any significant modification to the game. The main difference will be the controls, taking them from PC to Xbox 360 and Kinect, so if you were already enjoying Minecraft on PC, you may not have a whole lot of reason to make the jump to enjoying it on Xbox 360.