Have you found Waldo ? (Just kidding ;) )
What I'd like to have next is a way to change the viewing direction and the lighting dynamically.
Paint color is not like a screen pixel. It changes depending on the light color, and direction.
Nightwatch maybe was intended to be watched lit by a dancing flame.
I am very hopeful for new rendering techniques like Nerfies, for this type of application.
It also has the potential to reverse the effect time had on the painting, so we could experience this it like it was painted.