Earlier at MWC, Texas Instruments demonstrated a stylus that could be described as a mix between a stylus and a laser pointer, allowing the user to navigate the interface of a tablet over ultrasonic frequencies. This will allow the user to select, navigate, and zoom in and out without having to actually touch the screen unless they wanted/needed to. This is achieved with the use of microphones placed in each of the four corners of the tablet, which will help the tablet pinpoint where exactly on the screen is the stylus pointing at.
Ubergizmo
See also:
mrnom, Texas Instruments demonstrates ultrasonic stylus
