I may be wrong but I think it will be a quite a few more years before those portable things will become worth while … especially concidering the price.
I saw a very brief piece on it in either the Gadget Show UK Channel5 or in the news from Hanover/Germany Consumer Electronics venue. To me it looked like a cut down version of the failed MS Tablet PCs.
I think it falls between being to large for everyday carrying about (PDA/Blackberry ;D for that) or too small to be really useful (Laptop/notebook for that) and too darn pricey to be a realistic option.