I had a unique chance to see a 70mm magnetic print this past year. To my eyes, the image looked a lot like the THX laserdisc in terms of color to my eyes, but it was free of any digital enhancement and grain reduction. It looked like a 1990s film, which is to say, great.
The magnetic sound mix was a revelation. I’ve never heard the movie sound so good. The AC3 LaserDisc/DVD is a pretty good representation of that, but there is such a unique quality to mag that it’s really impossible to compare the two.
Either way, it definitely proved to me that the Blu-ray, in any iteration, is a joke.