bill - 7:53 am on Jan 7, 2013 (gmt 0)
More importantly, the orientation and position of some screens will change to be more touch friendly than a big vertical sitting on the desktop.
I was in a big electronics store recently and some of the 20"-30" touch desktop screens can be set at about a 25° angle. That could make more sense for a touch workspace. Although then we'd have to reconsider office lighting and the screen glare.