> If you think about it, the whole concept of renting files doesn't really make any sense.
It does. You're paying for a temporary license to view certain content. The fact that it physically is represented by a file on your disk is irrelevant.
And please, "but MAFIAA would force everyone to use DRM and would control everything and my cat!!!!!!1111" is getting obsolete. Most content these days is available for sale, where you get a permanent license along with non-DRM-ed data.
And please, no crap about "backups". They are simply not useful for rented content with a lifetime of 1-3 days.