The recent Kinect hack has brought Tetris into the spotlight. Done by Conan Chen, this Kinetris project is a hack to turn you into a Tetris controller.
Kinetris, unlike the classic tetris game, Conan-Chen has designed it to have the shape previewed before the actual blocks dropped from the sky. You can then choose the position and make a circle with your hand to rotate the block. See the following video for more details:
However, I would be more convenient playing tetris with buttons, instead of using hand motion. It looks so tiring and I’m sure I can train a good right hand’s muscle once I’ve completed level 99.