LG's Netflix-lovin' Revolution wasn't the only standout demonstration at Qualcomm's MWC booth -- the company also cut out a bit of space to showcase a wild new ultrasonic pen that's able to transcribe writing on paper directly into one's phone, tablet or laptop. The gist of it is simple: the pen can be equipped with an actual ink pen or a simple nub, and there's a battery-powered transceiver inside. Using standard, off-the-shelf microphones on a mobile device, your future phone or tablet could pick up vibrations from the pen with a radius of around 30 centimeters
