I think the “browser on the TV” approach Google seems to be taking is gonna suck. I don’t want a browser on my TV. The second screen approach (iPhone/tablet/netbook with you on the sofa) works better for checking email/browsing while watching tv.
I agree with Lucas, I want apps on my tv. But the UI has to be TV-UI, leanback. They should build some kind of html5 television UX standards that I could then easily build apps on. The TV UI would be quite different from the regular web UI.
Or I may be wrong there.