This is a very interesting development which provide us with the ability to use human body as an input device in our interaction with the digital media around us. For example it's allows you to control your Ipod or your phone simply by moving your fingers or tapping on your hand.
Everyone wants to believe that he or she is the biggest and the most important creation in the whole universe, maybe it's true, in some metaphorical way. But if we speak about phisics the truth is obvious and expressed nicely in the fllowing image. You can see the relative size of our home planet (the Earth) in the solar system and the universe.