The computer is still biggest e-reading device (37%); then Kindle (32%); iPhone (10%); iPad (3% after 3 weeks in market!).
Once people start using/buying e-books, they don't go back & tend to become more exclusive to e-books.
Are your reading habits changing? Are you happy enough with a hard drive full of books, instead of an inviting pile of books on your nightstand? Not me. I read and review plenty of ebooks, but I want the inviting titles, colors, and shapes enticing me to hold a book and read the words.