This is something Canonical and Ubuntu have been trying to do for a while. It's definitely interesting to think about as phones become the de factor computing devices.
This is really really nice. I'm glad to see that they didn't abandon the phone to desktop model that they originally promised. This is the future right here. Its just so bland looking. I know that doesn't really matter, but they need some good ui/ux people to really sell this thing.
I found the demo pretty impressive.