During GDC we took a look at a student project called SurfaceScapes that brings D&D to the Microsoft Surface. It's not just a simple "Ooooh, touch the screen to activate your character sheet!" port of the pen and paper game, but a touch-tastic experience that will blow your mind. Plot a miniature down on the Surface, and it recognizes your character. You can pull up radial menus for actions, spells, and attacks, see your line of sight, move your character, and run the entire game just using your power of touch.