The presence or absence of a multimedia-optimized video driver is up the manufacturer, and since they're 2 different companies, there's always hope. I haven't determined whose drivers are on the device though. So far, few companies have bothered really tweaking video on PPCs, so the chances are kinda slim.
It runs on the Qualcomm MSM7200, same as the Tilt/TyTN II.
So far, it's been very stable. I've only had to reboot it once when it stopped seeing the microSD card (a not uncommon issue with WinMo). It's not like the old Toshiba G900 which certainly had a couple serious bugs, that's for sure
I personally find it adequate for gaming, but prefer traditional hardware buttons for gaming. I haven't met touch (non-mechanical) buttons that rival the traditional type yet for gaming. I've played a few flight shooters and an RPG and it's OK, but for platformer style games it's not great. The games themselves run just fine (quickly and smoothly).