Having being one who has taken his work environment from a full workstation to a tablet with the workstation as the file server, I can see this being a good idea. If the price is low, and there isnt too much in terms of a bottle neck with the operating speed, then this would work for a ton of folks.
For me personally, If it comes out, I just might get one and see about making the laptop that I am typing on now a file server, and my Treo the "device that can do everything in a pinch when i dont wanna carry a man purse"
Oh, I have read that battery life would be in the area of 3hrs for the first version. If it is 3hrs with wifi and BT on, then they have a heck of a sell. If not, then its no better than my 3 year old TC1000 that runs at 1GHZ with a transmeta processor and has a larger screen.