I feel the opposite. Whenever I'm using a computer without a touch screen and the screen is close enough to touch (or in a convenient location to touch), I have to fight instinct to touch the screen. Sometimes it's just easier (for me at least) to jab your finger at the thing you want to click on than it is to move the mouse to it.
I think it's really context-sensitive. Some things work best with a touchscreen, I suppose. I do know one thing - I'd probably rather beat myself to death with a tablet than try to program (or type anything at all, for that matter) on it.
