Will the cancer called Colour Grading cling on to 4K-Bluray?

[dubious]

If you restore a film from negative though, color timing is an essential part of process. Unless you're going with a previously timed positive print, but you won't get the benefit of 4K from that source. I know you're trying to get at the Teal & Orange debate with newer movies more likely, but it is a step in the process.