Has a Microsoft's take on Wii U gamepad been spotted at Valve?

[Soundwave]

the2real4mafol said:
Oh god, that thing is fucking ugly and big. The Wii U controller is big, but at least it looks good and is not as bulky.
this can't be for xbox 360 can it?

It's almost certainly a prototype for developers if it is what people are speculating it is.