Your ebook needz moar powurz

Just saw the first of the CES 2010 videos from Revision 3. It's about a combined ebook and tablet computer. Why is it that people seem to want to add the functionality of a laptop computer with an ebook?

Firstly I really think that if it was SO obvious to do this, then people would have been reading lots of ebooks on their laptops and there would be little need for the ebook readers themselves. Unless there is a massive happy underground all busily reading away on their laptops somewhere?

The two other major concerns are of course, power and weight.

You want to lug around a laptop all day (even a tablet) in your arms, taking in the pages of your latest novel, then get fit and be prepared to stand about three feet away from a power source. Not to mention the fragile nature of a laptop or tablet computer. Could this by why tablets never really made much of an impression originally?

(Don't even get me started on the whole thing about blocking the vents on a tablet while trying to hold it comfortably.)