I disagree, I think it's exactly DRM. It's not DRM that normal consumers ever interact with though (except second hand by seeing the movie, or not seeing the movie as the case may be) but it's rights management none the less. From the failure modes it doesn't sound like there was any security above and beyond the standard DCinema encryption.
Cinemas have never had "ownership" over the movies they run. Do you not notice the slippery slope your argument is on? Either you're dignifying the concept of DRM, and acknowledging that there are times it's valuable, or it's not DRM.
I guess don't understand your argument. Why are you bringing up ownership? Cinemas purchase the right to play movies. I'm pointing out that the problem here was with the standard copy protection schemes employed by the digital cinema industry, not some sort of extra protection that you seemed to imply existed in your original comment. I would call that digital rights management myself, but it seems you are attaching some sort of extra meaning to those words that I'm not.
