When the PS3 motion controller was shown at E3, it was immediately compared to the WiiMotion+ and cast aside. Microsoft's Project Natal stole the limelight at E3 as being a superior technology, but there are a few simple reasons the PS3 motion controller is better for gaming than both of these rival technologies.

1. The accuracy - WiiMotion+ was shown to have 1:1 motion control, and Microsoft's Project Natal also claimed that it had 1:1 motion control. However the live PS3 tech demo showed us that the PS3 motion controller has sub-millimeter accuracy, a claim that WiiMotion+ hasn't made. Project Natal's claims were also shown to be false when their live demo on Late Night with Jimmy Fallon showed a significant amount of lag between your movement and it's correlation on the screen. Obviously the technology is still in development and may improve.

2. Ability to use more than one controller in conjunction. The WiiMote can also technically do this, but requires a physical connection to a Nunchuk. However the live demo at E3 showed that the PS3 motion controller would work in tandem with another motion controller without any physical connection. The possibilities of this feature are very exciting, and the PS3 "Zelda" demo showed how this could work with core games.

3. Better tracking. This one hasn't been picked up by most people yet, but the tracking on the PS3 motion controller is potentially much much better than the WiiMote with WiiMotion+. Here's why. Sometimes when you're playing a game on the Wii, you'll accidentally point the WiiMote too far off the screen, which will give you a few seconds of zero tracking of your movements. This essentially ruins your game, and requires that your WiiMote is pointed towards the sensor bar in some way, because it works like a remote. However the PSEye tracks the ball PS3 motion controller, rather than the remote sending data to the PS3, which is how the Wii does it. This means that you could technically turn the controller away from the camera, upside down, straight up, whatever, as long as nothing is blocking the view of the camera, your motion will still be tracked.

All three technologies have got lots of potential, but the PS3's unrivaled graphics, combined with a superior motion control technology than the Wii seems unbeatable. Project Natal has a lot of potential, but I personally can't see it being used for anything other than casual games. Anyone who has used an Eyetoy or Xbox Vision Cam will know that you need something to hold when playing motion controlled games, which is a huge part of the Wii's success, Nintendo figured this out a long time ago.