If Kindle, Apple, Google, or Kobo don't use this DRM, who's left? Is there a story here?
I have an iPad1, so I'm probably screwed. I'll still be able to use the Kindle app to read borrowed books, but some books don't allow reading on Kindle.
If DRM breaks for it, then I'll simply stop buying books from the Sony store (which I mostly have already) and just use DRM-free ebooks from gutenburg etc.
Plus lots of other vendors that don't have their own hardware chain. Powell's books, for example.
Or anyone attempting to self-publish a DRM'd ePub without putting it in Apple's store.