Consumer Electronics show is an annual event.
This year showcased Plastic Logic’s flexible digital book reader that is flexible and very thin (compared to Kindle).
I expect the digital book Readers to become eNotebooks (registers). Most people will just carry such thin sheet of plastic and electronic pen to do their day-to-day work and share it with others. Students in classroom will take notes, do projects, submit assignments and write exams using such eNotebooks.
I expect this to happen within next five years. And I look forward to that day!
BTW - Best consumer product in the show was Panasonic 3d Plasma TV as judged by CNET.