Blu-Ray.com review of the 4K UHD release: http://www.blu-ray.com/movies/Star-Wars-Episode-VIII-The-Last-Jedi-4K-Blu-ray/193044/#Review
"UHD release offers an increase, often substantial, in terms of both textural clarity and color depth and vibrancy. The film, shot on film, retains an inherently natural and beautiful grain structure, here a little more pronounced than that on the Blu-ray, but the end result is a substantial net increase in textural yield. The native 4K presentation is a sight to behold, with detail refinements abounding from beginning to end. Watching closely after the Blu-ray and making some direct scene comparisons reveal the UHD’s superiority… This is the way to watch The Last Jedi. The disc boasts a significant increase in detail and filmic credentials while also taking full advantage of the increased color output under the Dolby Vision parameters. If for no other reason this disc is a must-buy for its reference UHD video presentation. "
Wow - it really sounds like they’ve done a stellar job with the transfer. Let’s hope this sets a benchmark, leading swiftly to more 4K Star Wars…