Interesting. Would you in essence buy the content and then they would deliver it over some long period of tome rather than buying it if you wished after it was stored withone ones server. The buy it but then having to wait several weeks for complete delivery would not be good for instant gratification whuch would othewuise be satisfied by going out and nuying a a disc or having it physically delivered within a couple of days. I like the idea of ordering new titles in advance and having them to play the day of release but I don't like having to wait a considerable time to download an older title once I decide I want to watch it. Nothing is perfect.
The latter part of your first sentence is how it was explained to me. So it sounds like they will auto download any new release in advance (unless they offer an opt-out option). Then they will notify you that a new movie is ready for purchase after it has already quietly downloaded in the background and if you decide to purchase, BAM it's already there ready to be played. :-)
From what I've seen, one or two movies per month will be offered, so about half a gig or so per month to pre-download.
I've read also that the media server is only compatible with Sony 4K sets, but I'm trying to verify that also.