Photos: Tech visions of future from NextFest

Dutch artists created a futuristic version of Pong, pictured here being played by two girls. The virtual tennis game requires players to track a 3D ball with their monitors, darting left and right to keep the ball in play. By swiveling the screen left and right, players can adjust their shot's speed and trajectory.

Photo by Stefanie Olsen/CNET News.com