Alright, the title says it all, so here you go:

Here's a really good one, too: the latest, high tech, long lasting, super fast, fully loaded, rugged yet light tablet device. Available as soon as 2145. Free trip to Mars not included.

See, this was really the big question about Tablet PCs all along. Not if you can compile on it fast enough (you hardcore developers should just go get a nice 64-bit desktop). Not if Longhorn would run on it (by the time decent beta code hits, we'll all have much better machines anyway). The real question was whether Doom 3 would run on it.
This is my 1.5 GHz Banias M200, 1 GB of memory, a few small system performance tweaks (but nothing major like turning off themes, for instance), all the Toshiba utilities running, OneNote and some messaging apps in the background, the latest SP2 build available to testers, and stock Toshiba video drivers.
The in-game settings were left to the "detect my hardware and suggest" defaults, so I'm sure more performance could still be gained. Of course, it doesn't look quite as smooth as on my older desktop (which has a crappy GeForce FX 5200 video card, and still runs the game at the same resolution as the tablet, just with slightly higher detail). Oh yes, and gaming with a touchpad is pretty scary, and the singleton Toshiba speaker sounds as bad as ever.
Before you ask, no I didn't try any crazy tablet feats like trying to run the game in portrait mode or with the pen. That's just foolish. The M200 is pretty much more of a notebook anyway, so it was non-tablet mode all the way.
Next up, will Half Life 2 run on the tablet? Stay tuned!
Update: so yes, after playing for a while, I do have to admit that the game bogs down during firefights. Further performance tweaking is probably necessary. That or a processor upgrade, since nothing much can be done about the video card.