The End of Paper Book Manuscripts?

Call it the beginning of the end - according to New York Magazine, Hachette Book Group has distributed Sony e-book readers to its editorial staff. Agents have to email files of manuscripts rather than sending paper. Apparently Simon & Schuster also has the devices (Amazon was too tardy with the Kindle), though only some of the editors actually use them. Unfortunately, there is no edit function, so editors can only read and not mark up documents, leaving some writers, I'm sure, cheering.