Haven't they heard of a green screen and VisionStudio:
http://fxhome.com/visionlab/video-gallery/12
Queue the "Virtual set " video...

I mean is the real thing THAT important... Come on people:
Ballmer:
"Virtual.. Virtual... Vitual... Virtual.."

So, that's more than one pair then?

The important question though is : is he talking crap, or not? From 'a day per frame' to 'realtime' in five years is really quite fast.

I smell bullshit, and excuses like 'well, I didn't actually mean raytraced, I meant GPU rendered in a vaguely similar style'