I think that the fisrt thing that needs to be worked on is the design of the hardware. I don't know about anybody else, but for the most part, the designs that I've seen pictures of aren't very eye-catching. So far Asus is winning big time in the design category. Attractive exterior, the controls don't give off a look of complexity, and they have minimized wasted space around the screen. This came out of a discussion I was having with a coworker of mine (er, I guess he's my boss, but whatever).
I was trying to think of good uses for this type of technology, but couldn't think of many. The best I could think of would be for technicians that have to go do on-site work and would like to avoid carrying around a laptop, but want something similar.
These things still seem too big to me. They seem to be about 4 times bigger than my Palm (which I carry in my pocket, btw) and that just seems like too much.
In closing, the idea is there, but the implementation looks like it's sucking.
-Ryan