But now, with ebook sales soaring, and with the iPadlooking to make them soar even higher, publishers are panicking. Thanks in part to deep ebook discounting by Amazon, but also because the same people who can afford hardback books are the same people who can afford e-readers, people are starting to buy ebooks where they once bought hardbacks. The only cash-cow remaining in publishing is disappearing, like CD sales for music, and DVD sales for movies.
via techcrunch.com