I think a poster on that link that Martin posted had it right. That the screen is that way so that they can use the same casing with a bigger screen later on. The closest to this that I like is the HP TC1100, but those are $1,000 brand new and only have 802.1b and I don’t think HP makes them anymore. I have doctor offices that use the TC1100 for purely mobile RDP sessions. A similar device with a Flash Hard Drive could do the same and cheaper. Hopefully this will have RDP/Citrix client on it.
Correction, that is a TC1000 with 802.11b. The TC1100 has a 802.11 a/b/g WiFi.