Mark S. mentions it in the Engadget interview: "If I dock this, I can get the full Ubuntu desktop".
It doesn't sound all that wonderful.
Desktop/mobile crossover might be better served with cloud-sync.
Except if I'm in a developing nation where I'm not guaranteed connectivity. (Don't scoff yet, because I'd say the US is in this category.)
Maybe this is going to be the mobile toolkit you’re talking about?..