Do you count the Surface Pro as a tablet? It is, touch screen and all! It runs just fine, but I prefer my desktop for the larger monitor. Yes, I could hook up a bigger monitor, but it's no longer portable.
I have played on an airplane, and made the flight go by SUPER quick. I pretty much play standard size maps, and touchscreen on a plane is definitely easier.
I don't think many of us actually use touchscreen, and would've preferred the extra time to be spent on improving the AI, but it's different groups anyway.