Speaking of CES, how about a super-low-cost tablet?
I found this intriguing: http://www.engadget.com/2012/01/12/ainovo-79-novo7-paladin-ice-cream-sandwich-tablet-hands-on
My first thought was a cheap enough tablet to let every school kid get one from the school district to use instead of printed text books. Far cheaper than supplying textbooks, much easier to carry around, and simple for teachers to use for communication of grades, homework assignments, etc.
I would expect push-back from publishers of textbooks, but otherwise I can see a lot of marketability for a low-end tablet.