Why are people so excited about touch screen macs. Touch screens were on some computers during the 1980s and the things never got above novelty status. How is touch screen a better interface given that I have a mouse and now I will have to move my hand from the mouse (or keyboard) to the screen to interact? Seems like a very slow and awkward way to work IMHO. What's the big deal/benefit that is getting everyone so excited other than it is just cool??