Here at BlackBerry World 2011, a WiFi-enabled 3D shooter game runs on PlayBook at 60Fps.
The well-known 3D shooter Quake 3 Arena can be seen running smooth on a PlayBook with a couple of other apps in the background, including videos. It only took Joel Keller a couple of days to do all the work and get it running. In addition, several devices can be connected in a multiplayer game over WiFi.
Here is the video: