So, if you bought a DVD licensed by Sony, can they now legally enter your house and take your DVD?
Or can Sony have some sort of DRM that prevents the DVD from playing when Sony loses the license agreement?
I’m just trying to reconcile how digital purchases can be subject to license terms changes, while a DVD apparently can’t be.
If there is ever a next successor to Blurays, for VR film or something, their DRM could be linked to a validation server. Once it’s always online what you describe becomes possible.
Currently Blurays and dvds are designed for offline playback, and are read only, so their licenses are always valid and perform no verification.