Wired features a story on how a study by the Human Interface Technology Laboratory in New Zealand used a pair of OpenGL ES enabled Nokia Series 60 phones in a game of Augmeted Reality Tennis - tennis played without a real ball, using a virtual tennis court model superimposed over the real world as seen through the mobile phone camera. Players interact by simply swinging their phones to hit it across a net, just as in ordinary tennis. The study notes that mobile phones have developed into an ideal platform for augmented reality because they have full colour displays, integrated cameras, fast processors, bluetooth for synchronization and dedicated OpenGL ES 3D graphics chips. When the player points the camera phone at the markers they see a virtual tennis court model superimposed over the real world. The full pdf paper discusses the sample application that was developed using peer to peer Bluetooth, vibration for tactile feedback and OpenGL ES for 3D graphics and visual overlays.