Watched "City..." on the Blu-ray last night. Wasn't much for the CGI guys to do but the ship in the opening, and a couple of planet shots.
But I have to comment on Nimoy's makeup. I guess the remastering process spikes the colors a bit. In a couple of early scenes Spock actually looked GREEN, and I could clearly see the makeup line around his neck. I guess this falls under the heading of "things they didn't think would show on 60s TV that hi-def doesn't do any favors for."
He's a Vulcan. He's supposed to look slightly green.
Did I say "slightly" wise guy? He looked jade green. Like a light-skinned Orion. When has that ever happened pre-remastered? Would I have even mentioned it if he looked that same as I've seen him over the last 40 years?!