The size of the screen also has something to do with the size of the keyboard, but I'll get to that below. In the meantime, the verdict is resoundly in Google/Samsung's favor.
Round 3: Keyboard and Trackpad
The Google/Samsung hardware is as close as it's possible to get of being a copy of the Apple (AAPL) MacBook Air 11.6 inch, so the keyboard and trackpad are outstanding. Basically, as good as they get on any 11.6 inch laptop, bar none.
The Microsoft Surface RT represents Microsoft's vision of the convertible tablet/laptop format. Microsoft accomplishes this with a flexible rubber/gel-ish "cover" which snaps on with magnets. This seems very elegant at first.However, once the conceptual novelty value of Microsoft's visually beautiful solution has worn off, a set of questions arise. I'm saying this with the disclaimer that the Surface RT hardware has not yet shipped (will do so in a week from now) and that the journalistic preview was very limited. I have not spent any quality time with it.
A. The rubber-ish keyboard looks like it needs a hard and flat surface to work in a reasonable way. If you have your laptop in your, well, lap -- it seems to be a non-starter. Want to type while you're waiting for your flight, or otherwise don't have a flat table? Too bad.
B. Related to (A) above, the keyboard doesn't support the screen, so the screen has a separate stand, in turn requiring mostly flat and additional tabletop real estate. It seems to make for a sensitive setup.
C. As for the Surface RT keyboard+trackpad itself, I obviously have not been given the opportunity to type on it yet, but it looks to be a very bad experience compared to even a mediocre "regular" keboard+trackpad, let alone Google/Samsung's outstanding hardware. If you see a review from someone else claiming otherwise, let me know!