I just knew this was coming, Scientists at the Rensselaer Polytechnic Institute have come out with the programmable tattoo concept. Human hair-sized nanotubes were embedded in the skin the display the image of your choice. The tattoo will still be visible even the power is off. You can change the tattoo to anything you like in an instant or make it go away. Wouldn't it be cool to flash a message or design across your body in an instant.