Every once in a while, I will come across a website or application that, for some strange reason, I feel compelled to touch the controls rather than mouse them. It's actually a strange feeling.
Thing is, I've never used Win8, never had a tablet device nor a touchscreen phone. Where did I get this compulsion? Dunno, maybe it's actually a very natural action that's only now being exploited in computer UIs (touch screens have been around for a very long time, I'm aware, just not on such a level of exposure), but we've all trained ourselves to use keyboard + mouse, so it doesn't seem "right" at first.
Personally, I'm looking forward to the day when the mouse is obsolete, but I still believe we've got a ways to go...