What's especially great about this is that when I first saw the video's title, I had yet to note that today is April 1st, and thought, "Excellent! I love Kinect hacks!" I imagined swiping through messages with a wave of the hand, or using voice command to delete or move emails. Of course, when the video started, I remembered why this hasn't been done before: Because Gmail is a tremendously powerful and complicated web app, and all the intricate gestures you'd need would obviously be less efficient than just clicking or using keyboard commands. Way to kill my futuristic dreams with all your "practicality," Google.