What I have learned from all this is even though I have the KScape HD version of a movie, if its a movie I would want to upgrade to 4k if this becomes available, I will hang on to that disc, even if in a box in my garage, in case I need it for a special discounted disc to digital promotion. On the Hobbit movies, I had the KScape HD versions thanks to the old Ultraviolet system, but I only had a digital discount of $15.99 on them. In went the disc, and I got the sale disc to digital of $4.50 or so! YEA!