What I find interesting is that the next-gen tablet mockup shown at the Maemo Summit already use parts of the current Nseries design language (of the N79/N97) like the positioning and design of the front Nokia logo...

I wouldn't be surprised if the RX-51 actually looked like a somewhat evolved version of that:

http://flickr.com/photos/kypeli/2884713151/

Anyway, I hope that the slightly smaller, keyboard-less "version" of the N97 in the video is a new smartphone...