Imagine if your iPhone was the size of a small watch? It would be impossible to navigate without decent sized keys and icons. But what if you could project the screen onto your hand, and then type directly onto it? The size of our fingers is limiting how small devices can become. But with a new system called 'Skinput', a sensor around your arm teamed with a minute projector can literally turn your hand into a touch sensitive screen. At the moment the sensor is a bit bulky and unattractive but we are not far away from playing music and making phone calls on our hands. Watch this video and read accompanying article to see how it works.
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