Mathew Ingram writes:
Publishers are partly to blame for the walled-garden status of the market [...], since they handed Amazon and Apple the stick of digital-rights management, which the two companies are now using to beat them — and they won’t allow their books to be loaned to other users, or even in many cases to public libraries, and they certainly don’t make it easy to get access to them on different platforms. Welcome to the mutually incompatible, silo-based, platform-dependent and user-unfriendly future of books.
And it meshes with a comment I read online today too. Unfortunately I can't find the source, so I paraphrase: 'DRM in eBooks isn't being used to prevent piracy, but to enforce platform lock-in.'
If I might make a note, though, the iBooks application for Apple does at least allow anyone to load and read industry standard unprotected .ePub files, whereas the more popular Kindle platform explicitly (and intentionally) does not support this.