Just an early opinion.....
I have an advance copy of the Blu Ray. It's absolutely stunning picture quality. I only have the film so can't comment on the extra's and what value they add, but the picture quality is first rate, as good as any Blu Ray you will ever see imho and the sound mix is very good ( even when down miss through stereo sound on a TV )
I've tried the disc on both 1080p and 4K screens and also use a 7.1 sound set up, film is all impressive output wise regardless of how its played back.
Tomorrow's digital copy might well be as good, but if holding out for the Blu Ray...the wait will be worth it.