For what it's worth, we have set up at the Boston Architectural College's computing teaching spaces these LCD tablets in two configurations.
In one lab the students have a dual-monitor set-up wherein one is a 12" Cintiq LCD tablet and the other is a regular LCD - the instructor's workstation is equipped with a similar configuration except that the main monitor (which is also connected to an LCD projector) is a 21" Cintiq. In this lab we offer courses in imaging (Photoshop) classes as well as in 2D drafting (AutoCAD 2011) and 3D modeling (again AutoCAD, Rhino, & SketchUp) and BIM (Revit).
In the other location, called the Computation Design Research Lab (CoDe R), we have some additional workstations with each of the two LCD tablets where the mission is to provide our learning community (students and in fact faculty) who're interested in technology, motivated to experiment with or learn about other non-mainstream applications that's not necessarily part of the core curricular experience.
Cheers,
. Diego .
PS Back in 2000 or 2001 I came across one of the first SketchUppers from the @last era; I met and saw Yasser Malaika work the tablet like a ballet dancer - in a smooth continuous process. That gestural approach to 3D modeling was what helped me learn, even love and appreciate the value of SketchUp versus everything else available at the time.