I dont think DRM is the issue. I think its the fact that you dont have a physical medium so to your minds eye the value isnt quite what they say it is.
I really look forward to the day when a couple of terabyte hard drives don't cost much, and you can have all your movies on a hard drive and select them with the remote. However, I still want to be able to back them up and play them on other devices, just like I do with my music, now.