Fundamentally, I find paper books are more satisfying as a _possession_ than ebooks. Furthermore, as an Iliad owner, I still find p-books much easier to casually browse through. When doing research where I need multiple references spread out around me, e-books/readers do not come anywhere close to being useful (nothing electronic does actually).

Maybe my experience suggests that publishers look carefully at the fiction/non-fiction divide i.e. any book that might be regarded as a reference or treasured possession (eg. coffee table books, art books) should be made available as an e-book free. The nature of such books will mean people will not settle for just an e-copy and will likely buy a hard copy if they like it. Fiction (esp. throw away paperback novels) should be treated more like magazines eg. give them away but include advertising.