A simple shift up, down, left or right, exposes a new function set—Type, Move, Surf or Play. Type is a qwerty keyboard for entering titles and URLs. An easy shift down, and you get a touchpad for navigation. A shift to the right gives you an option for casual gaming. Shift left and spin 90 degrees to get a “TV” remote with a NUI interface for a kickbacked viewing experience.

From here