Barence writes: Microsoft will deliver a touchscreen PC that is "no thicker than a sheet of glass" within the next three years, according to the company's principal researcher. The device will be the next generation of Microsoft's Surface project, which currently houses a touchscreen PC in a deep cabinet that uses cameras to detect hand gestures and objects placed on the screen. According to Microsoft's Bill Buxton, "Surface will become no thicker than a sheet of glass. It’s not going to have any cameras or projectors because the cameras will be embedded in the device itself." Microsoft is developing a new screen technology to make this possible. "The best way to think about it is like a big LCD where there’s a fourth pixel in every triad. So there’s red, green, and blue pixels giving you light, and a fourth pixel which is a sensor that will capture stuff," Buxton claims in an interview with The Globe and Mail.