I've recently been playing around with full desktop apps on a windows tablet. Even with a small tablet seems to work fine if you use a stylus.
I've been able to get a few desktop games running even. Stuff like need for speed most wanted, dead syncronicity, far cry 2.
Obviously the games work better if you can use keyboard only, or are point and click. And so far, on the tablet I was playing with, there are quite a few that just seems incompatible with the hardware.
There's some cheap gaming brackets around that look worth the investment (Holds the tablet, controller buttons sit at either side of the tablet)
I also discovered gestureworks gameplay although I have not yet got around to playing with the demo, see if its worth the money.
Seems like there is a lot of potential for mobile gaming on windows - with the right software/peripherals and with a tablet that has a good compatibility.
What are you guys experience with gaming on a windows tablet? Like the surface pro series for example?