I would guess that how one answers depends on (a) age and/or (b) computer experience. I still wince at the idea of the mouse, as I still try to do things with the keyboard, as that was how I was "raised." With punchcards, no less, THEN DOS.
I am not looking forward to upgrading either my Vista (main computer) or the laptop (7) unless it's to make the Vista into 7. I'll wait for 9, I guess...