I think it was pushed to market to compete with Apple TV and grab some headlines before Christmas.
From the reviews I am seeing the interface is a bit laggy, both on the Revue and the actual Sony TVs. They didn’t really mention whether it was software, hardware or network lag. But this is definitely a big step for media, bigger than 3d rolling out IMO. Now we just need a Kinect like interface, the remote is getting way outdated.