iTunes ditching DRM for purchased audio was never really a glimmer of hope for video, and lets face it this discussion is really about video more than anything else.

iTunes movies still have DRM. Arguably DRM free audio had extremely little bearing on the future of video, given the very different demands of each marketplace.

Remember also, that with a few exceptions (Sony rootkit anyone?), music had a long history of being DRM free before digital distribution came along (vinyl, tape, CD etc). Video distribution by contrast has a long tradition of many copy prevention "solutions" over the years on many different physical formats.