The trackpad Magic is an interesting device. Many think that this is a step in the direction of a universe App Store, where even the desktop operating system is reduced to be more like a mobile operating system where the basic applications of the rule and slips of the fingers are the main method of control. But even if it's quite silly, is not something Apple wants users to replace their mouse on the desktop this typical, or at least a subset of users. That is a fairly important to do, and a...