The US Government patent office has it down as an “Expandable Control Device Via Hardware Attachment” but basically this Sony realising that developers can’t make games with just a pointer and a trigger and are thus sticking all kinds of other bits of plastic to next year’s motion-controller Wand.
Included in the patent are various ways to fix other more traditional controls to the Wand, including in a H-shape or the Nintendo-like Dualshock in one hand and the Wand in the other. Also featured is a “thumb reader used to validate the identity of the person holding the controller by analyzing the biometric data.”
There’s more at Kotaku.