Interface designers looking to translate spoken -- or written -- words into practical goals have a solid advantage over those designing interfaces for gestures or other non-traditional input methods. That's because designers are already familiar with the use of spoken language. "We're at the beginning of the gesture phase," says MIT’s Holtzman. "And not just the gestures, but everything we can do with some kind of camera pointing at us, such as moving our eyebrows and moving our mouths. For example, the screen saver on the laptop -- why doesn't it use the camera on the lid to figure out whether to screen save? If your eyes are open and you're facing the display it should stay lit up."