Along the lines of music downloads, I cannot see the need for books in a few years time. Yes you will have the hardened book reader that will not move from the book as they 'like the feel of a book in heir hand'. Overall I can see the 4 bookcases in our house being reduced year on year and having space for other furniture, along with the Cd holder.
My wife (English teacher) argued the case that they do not really have anything for eduction, and have not nailed that yet, so books for these purposes will be required. The last night I fine the below article.
http://gadgetbox.msnbc.msn.com/_news/2012/01/19/10189773-apple-announces-ibooks-2-ibooks-author-and-new-itunes-u
The way things are going we will not require, bookcases & cd/DVD storage as it will all be on a device iPad deluxe 10 or something.
How do you see the book world going, will people not read books in 10/20 years time, as lets face it, people do not use ledgers in big book form, or order books on paper anymore. You do not see people using an abacus, as everything like this is on a computer now. Why would it be any different for books, films and music?