While it seems an interesting device, since it is not "wearable" i cant avoid to compare it to the old Sony VGN-P11Z and his awesome size and specs:
http://www.notebookcheck.net/Review-...k.16038.0.html

...And the P11Z's keyboard is the best one you could ever find in a device of that size!
Today you can buy an used one for about 150 euro and add an MSATA 256 GB disk adding 100 euro more. Voilà!