When the Wii launched the console wasn't known for fantastic graphics, but was known for its cool motion controls. Sony tried to throw in motion control with the PS3 as an afterthought with the Sixaxis controllers and failed. Sony has now made its Move motion controller official.
The Move system has three parts including the Move controller with the ball on top, the Move sub-controller, and the Eye camera. The sub-controller is sort of like a Wii nunchuk and can be replaced with your existing wireless PS3 controller.
The main Move controller has a 3-axis accelerometer, 3-axis gyroscope, and a terrestrial magnetic field sensor, and the Eye camera tracks the colored ball. The ball on the end of the controller also offers the player feedback by changing colors and the controller has rumble feedback too. The Move controller will land this fall at an undisclosed price.