Lock-in here only prevents sales on the content side. Yes, you can't shift your whole collection between hardware vendors yet but you also can't buy from severa

Lock-in here only prevents sales on the content side. Yes, you can't shift your whole collection between hardware vendors yet but you also can't buy from several content vendors yet. If someone announced DRM free books they could sell to all of their competitors' devices. Opening up content sales is more important than opening up hardware from a consumer point of view. You can buy a ebook reader from hundreds of vendors but you can only buy books for it from a couple (including the one that sold you the reader).