This is a nice corrective to the Ebook story, though in some ways too it glosses over the access point (that ebooks opens access to distribution for many unpublished authors, some good, others not).
Playing the either/or game is dangerous and misses the point of the whole discussion. So let’s repeat some more platitudes: e-books taking 10% of total trade market share is still 90% accounted for by print. E-publishing, at least for now, favors writers who generate or have generated a sizable backlist, ergo favoring genre fiction.