Pottermore: J.K. Rowling Goes Digital
Needless to say, the effect on bookstores and the publishing industry will be significant. J.K. Rowling is, in effect, self-publishing her already paper-published stories, and releasing them DRM-free via Pottermore. This bypasses her publisher and the bookstores that have sold millions and millions of Harry Potter copies. Given that ebooks are now at 20% of total sales (up from 1% four years ago), the numbers that Pottermore can generate most likely will not be insignificant. Remember how people lined up at stores before the day of a book's release, in the same way Apple fans lined up for the latest iPhone? This may or may not be a thing of the past after Pottermore, but the effect of her going digital has bookstores unhappy, and will certainly have an effect on publishing.
On the other hand, in a bit of a reversal from Rowling's position, we have Amanda Hocking, an author who was selling millions of copies of her books through self-publishing, signing up with a traditional publisher.
What I see here is that the stigma of being a self-publisher is lessening for an author, while traditional publishers are now more accommodating of authors who have released their books themselves and have proven their stories' saleability.