Where is eBook Interoperability?

If music has managed to shed DRM, why have ebooks resisted? Part of what caused Jobs to issue his statement was a European Commission investigation into interoperability of digital files; why have there been no similar investigation regarding ebooks?

It’s annoying, and frustrating. You get locked into a platform, and can’t change. With 350 books purchased, I’m not going to switch to Apple’s iBooks, Nook, or any other service. I’m hostage to Amazon’s DRM for what, granted, is not a simple problem – my having two accounts – but one that the company should be able to fix.

I try not to think about it, but this does scare me - since I’ve gone mostly all digital when it comes to books (with Amazon’s Kindle). I wander if 10 years from now this is really going to bite me in the butt. Or hopefully we’ll sort it out - just like we did music.