Kinect related projects that involve Processing and Arduino are always so damn cool! Take for instance this latest demo by P&A LAB. They sought out to develop a tracking system that would control a light source by either turning it on/off or dimming the light. They've set up their rig to include some LED lights that represent the amount of dimming that would occur if this product were actually in use. The video shows a linear actuator move according to the gestures used in order to control the amount of dimming the light source would receive.