After reading this
http://lwn.net/SubscriberLink/561463/f87b1f2fbb11c442/
and especially "The covers have both data and power connections, so they could serve other purposes as well. Additional battery power or a hardware keyboard are two that were mentioned. The protocols and pinout information will be available, so the hope is that other companies come up with their own innovative ideas. "

I then had another look on the Akademy/Vesa-Matti video and from 10:45 talks about intelligent covers. The example of having party profiles linked to the back cover are funny considering the range of possibilites.
http://ftp.icm.edu.pl/packages/kde-a...ilfish_OS.webm
I dont think anyone has mentioned noticing this bit of info.