Regarding drawing and CAD programs, have you heard of Moment of Inspiration (MoI)? The interface is designed to be suitable for stylus input with fewer and fatter buttons, scrubbing, etc. More importantly, the workflows also seem to be designed around this so repeating or chaining actions is easy and you never feel like stylus input is cramped or lacking precise control.
Other pros:
-fully customizable HTML UI
-fast, lightweight but powerful
-advanced actions (cloning along a path) aren't archaic hidden abilities for advanced users, they're discoverable and usable by new uers
-reasonable price
-not as serious/enterprise as some people might need
-due to semi-indie status it probably won't serve as your ONLY 3d modeling tool with only a handful of file format option
No, I had not. I'll certainly take look.
I would say it depends. I love the touch screen (I've disabled my touchpad) - and I love the real pen/digitizer.
The sp4 is basically the dynabook: high dpi screen, a pen that works.
Still some annoyances with scaling in legacy apps - and I've yet to find a great "smart" drawing/cad program that really takes advantage of the pen - I'm thinking something like Ivan Sutherland's "Sketchpad".
I haven't quite gotten around to it, but I believe it would make a great Smalltalk companion (although it's a "button" short). It does work quite well with MIT's "scratch" system.