In the future, you will be able to use your skin as an input method. Take SkinHaptics for instance. Developed by UK scientists, this technology creates “tactile sensations on the palm using ultrasound sent through the hand.” While the sensations are sent to the palm from the other side of your hand, your palm will be free to display the screen.
Such technology makes it possible to come up with more sophisticated connected solutions. The above video shows what SkinHaptics is all about.