Sony's Google Powered TV

What will make for an appliance that can bridge the gap between lean forward and lean back entertainment in the living room, a question that's been out there since the Roku, Vudu and of course Apple TV all started claiming they had figured out what the masses want in their homes.
What factor or factors has thus far limited wide spread adoption to the general public? Is it the form factor of the device, the remote, the sets UI, connections, screen size, access to content, cost, or all of the above?
With the entry of the integrated Sony/Google TV perhaps some of these questions might get answered.






