Just listened to the com news for November.  I don't know what's been worse this month, 5150's snoring or ken Fallon's singing :)

About the GPU on the RPI; it's actually a pretty powerful little device.  I think the GPU is every bit as powerful as the actual CPU.  It supports hardware graphics acceleration as well as audio rendering and I have had CD quality audio playing at the same time as TTS through my OMX code and it never misses a beat.  I can't speak for video though of course, but again I suspect it would manage pretty much anything any game can throw at it.

But then the last game I played was Duke Nukem 3D about fifteen years ago :)

It's also possible to split the RAM in different proprtions between the GPU and the CPU