Amazon ate my homework kid - wins settlement and establishes a kind of precedent

Amazon settles lawsuit over deleted Kindle copy of '1984' - nice - you now own your digital content. But what will it mean for DRM - remember Walmart threatening to shutdown the DRM server and then backpedaling. Or indeed for remote kill switches in general? What happens when what Amazon/Apple/Microsoft wants to remove something from their content delivery network, but the customer disagrees?