A few people have been asking re technical details of the scanning, basically it is scanned at full aperture 4K, which give us over 3 times the vertical resolution of UHD, and a little more horizontal resolution (but negligible).

The print is anamorphic, so we end up with nearly 3000 lines of vertical resolution vs the around 820 lines or so on the official Blu-ray.
As for colour, it is 16 bits per pixel, vs 8 bits per pixel of Blu-ray, and it is 4:4:4 colour vs 4:2:0 of the official Blu-ray, so there is a lot of colour range to play with.

Of course, it is a release print, not a negative, so the print itself is quite variable as far as density, contrast and grain/resolution goes, but I believe we are pretty much capturing as much as is there.