I still think it's going to be Android PC that's the next big (Linux) desktop OS. It has openness and it has the big support of Google. Android is not suddenly going to be a desktop thing. It'll happen over time as Android devices become more and more important than desktops. An Android PC will serve to extend that Eco-system on the same level as iOS & OSX (but better since it's still fun).
I'm not sure I'm comfortable with Google (a large corporation driven by advertising profits) owning the desktop too. > It has openness and it has the big support of Google. Google did not open up Android 3.0 when it did not suit them to do so (commercially). I've never heard of Redhat or Canonical doing something similar with one of their Linux releases.
I'm not entirely comfortable with Google either, but I'm far less comfortable with Apple & M$.