Bill Joy has said there are a number of different types of internets that can be thought of.  Included is the distance web (what we think of as TV), the near web (what we think of as notebook, tablets, and desktop pcs) and the here web (what we think of as cell phones and handheld computers).

In the near web and here web, a powerful interface may be a touch screen.  Particularly for smaller devices, a touch screen lets you make the entire device a display, maximizing visual output and maximizing tactile input.  Historically touch screens have operated much like a mouse, but is that really the best way to use such devices?

Here is a video showing research that has been done breaking that paradigm, allowing control by the entire hand, and a new language of hand gestures: http://www.youtube.com/watch?v=iVI6xw9Zph8

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