I agree, I have purchased the All Region Blu-ray of CLEOPATRA and the results are stunning, however I would question the comment that Fox has lavished a great deal of time and money on preserving it's widescreen films of the 50's, 60's and 70's. To be sure some have been given a wonderful restoration for example STARS AND STRIPES FOREVER, SOUTH PACIFIC, SOUND OF MUSIC and ON THE RIVIERA whilst others have ranged from adequate to abysmal, HELLO, DOLLY! and STAR! come to mind. The studio seems to re-release the same handful of titles and ignore most of their catalogue. I suppose we'll soon see yet another release of the Rodgers & Hammerstein musicals in Blu-ray.
The studio has started releasing some of their earlier titles in a series called CINEMA ARCHIVES on DVD-R which are offered at premium prices and absolutely no restoration, in fact some of the widescreen titles are in pan-and-scan, and are only of VHS quality. It would appear that those in charge at Fox have seen that Warner Archives have found a market for older titles and have decided that could also cash in on this market. The difference being that Warner's do restore most of their releases.