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In the game, the gamer waves his hands up and down to mimic the on-screen virtual DJ's turning of the music-mixer knob - a bit like Guitar Hero 3 except you are simply waving your hands in the air.

Called real-time gesture tracking, the technology consists of a camera, which detects the user's face and hands.
When the user moves his hands in response to the screen prompts, the camera reads the moves and relays the signals to the image recognition software in the laptop, which then tracks the movements in 3D.

The software can also be used to control a spaceship in a game using your hands.
You can push your hands forward to move it forward, right to move it right and even make it pitch, roll and yaw.

So it can be used at popular attractions like museums and science centres for interactive displays.
While the Wii also uses motion-detection technology for its realistic gameplay, it is detecting the movements in the Wii-mote game controller.

This new technology brings gaming to the next level of realism because now the sensor simply detects human hand motion.