I got a MSI Wind Clone, 10" monitor 1024x600 resolution. The game works fine. Even on battery there is no slow down or anything.
In fact I tried a few other games, no proper testing, just some quick in and out play and audiosurf, civilization 3, sid meiers pirates! (the newest one from steam), worked fine.
There is something about playing winSPMBT while lying down on your bed in a small screen, wonderful