As anyone who's ever played a game of Duck Hunt is aware, there are ways of directly interacting with CRT monitors that don't require any modifications to the display itself (a la resistive overlays). A group of students from the University of Hasselt in Belgium have now taken that idea further than most, however, and developed a glove-based system that uses a pair of phototransistors in the fingertips to detect the electron beam as it makes its way across the screen.
Engadget, Glove-based CRTouch project turns old monitors into touchscreens
