I was hoping by now we could have something like a fine grain touch screen tablet A3 size: that would solve the feedback problem in that you'd be looking at what you drew. You can't be me, I'm taken
I had one of these for a while - one thing it isn't is light.
The other thing it isn't is accurate - the drawing accuracy drifted noticeably towards the edges.
There's a new generation of multitouch products due next year. A 22-24" multitouch interface light enough to keep on my lap is probably all I'd ever want for music, graphics and general browsing.