I saw it at Cebit. Couldn't type on it, though, as the guy who showed it around (to press, possibly, but I didn't care and just joined in) was already anxious to let me hold it (it was an engineering sample, but functional). It's quite lightweight, so it could be promising as a media center.
Still, I don't really see the point. It's a nice tech demo, but ultimately, it's too expensive to use it as a keyboard with an external monitor attached and too big to use as a multimedia controller. It shows quite well what they are capable of, but in my opinion, there's no real application for something like that. It will be too expensive for "basic" tasks and too expensive and bulky for everything else.
-huha