I don't think I was looking at AI generated images. My eyes were just drawn to things because the image is clearer.
Just like it did with blu ray.
On TV, VHS and DVD, I never noticed that Ripleys harpoon gun from Alien was still wedged in the bottom of the Narcissus door. Then on blu ray I saw it for the first time.
With 4K I noticed that Vasquez has tattoos on her fingers.
There are Ron Cobb style symbols above some doors in Hadleys hope.
Frost has a sticker on his armour that says "Nuke em"
There's an upside down human skeleton stuck to wall behind Hicks when he inspects the open egg in the hive.
Things like that.