Will "Retro art" do?
Hot take: "photo realistic" is just a style.
If it doesn't exist and wasn't taken with a camera, then "photo realistic" is just the name of the style.
Same with "pixel art", "water color", and everything else.
still respects what it is but clearly differentiates itself as something new
One day the majority of pixel art in the world, and indeed even photoreal photos, will be generated.
We'll call it pixel art even if the original motivation is gone.