[thegeek]

And here's the tree.
up.metropol247.co.uk 
Looking even more closely, I think they may not be on a dais after all - the purple floor looks like it's a mat on top of the LED floor - but you can see the edges of the LED tiles on the white platform, which is entirely virtual.

I'm still not buying the whole virtual set they've got, but the way they're using the Cube is very clever.

Not quite as convinced by the demo set, however:
up.metropol247.co.uk