In a technical development guaranteed to excite an abstract technical glee in geeks and creep normal people out if they think too much about it, someone has developed an LCD screen – like the kind you look at on flat-screen computer monitors and the back of digital cameras – that is also capable of recording an image. Because each display pixel is combined with an optical sensor, similar I suppose to the ones pointing out the business side of a digital camera.

The potential is neat/spooky: your computer screen could record you while you look at it. The only obvious productive use I can think of is for videoconferencing – you could make eye contact with the person on your screen. The current reality is that the current production state of the technology is a 3.5″ screen that can only scan an object that is pressed right up against the screen, and only produces a black and white image thereof. But of course they will develop it greatly from there.

Reminds me of that photo-sensitive “shadow wall” at the Ontario Science Center, where you stood up against the wall in a dark room, and a flash went off, and you stepped away while the wall glowed green except where you were standing when the flash went.

Link to article.