VIDEO GAMERS USE THEIR HEADS Italian PC maker Video Computer is marketing a headset that can be used in place of the joystick in any video game to perform the commands that control movement through the 3D space on the screen. To look left in the game, the player simply needs to slightly rotate his or her head in that direction. The UR Gear device, which uses infrared transmitters and receivers to detect movement and translate it into on-screen motion, was initially designed for disabled PC users. It will be available in the U.S. in the second quarter, and will retail for $99. (Business Week 23 Mar 98)