The patent, which was filed in 2011, is for a “USER-DRIVEN THREE-DIMENSIONAL INTERACTIVE GAMING ENVIRONMENT,” and would involve using a camera that’s connected to the PS3 to read a player’s movement and their positioning in 3D space.
While this might seem like Sony’s trying to rip-off the Kinect, keep in mind that the patent also references the Sony EyeToy - a peripheral that was released for the PS2 back in 2003. One could also say that the Kinect was influenced by the EyeToy. So, Sony’s kind of copying themselves?
As is with the case for patents, this doesn’t necessarily mean that this device will come out. It just means that Sony is thinking about it and possibly experimenting on how best to implement it.