You know, I thought the same thing but it's surprising how often I touch my Surface when I'm using it as a laptop. I don't think about it, it sort of just happens sometimes...like to tap a button or go back in IE by swiping backwards, or even just scrolling in a webpage I sometimes use the arrow keys and sometimes use my thumb. It's odd.

Equally surprising was how I would have to restrain myself from touching my non-touchscreen desktop monitor sometimes that I've had for much longer (i.e. years). Happens a lot as I'm sitting down and want to launch a few initial apps.

I think if you ever get a touch screen laptop you'll be as surprised as I was to see how much you do end up using the touch screen, even if it is "unintentional".