I've ended up with quite a collection of Mastered in 4k Blu-rays with all the holiday sales. Even Smurfs 2, although only for the 2D version. Starting to look like many newer Sony releases are Mi4k, but what I don't get is how they did all the re-releases without extras, but now they admit they can do extras, since all the new releases include them. Why would they want to open themselves up to the criticism?
At this point with my backlog I probably will wait for the magic of the 1100 upgrade to play any of these, so I get the full effect.
UMR on HDR vs 4K: The benefit of greater saturation and luminance capability is...not very evident in all images unlike more pixels which can be seen in every scene.