When scrolling through the Galaxy S10's wallpapers, I noticed how they all have a darker area towards the top right.
I could be crazy, but it seems like Samsung intentionally darkened the top right of its Galaxy S10 wallpapers to hide the hole-punch selfie camera ports on its Infinity O displays.
It immediately reminds me of Apple's iPhone XS wallpapers that are seemingly designed to hide the rather large and wide notch on its display. Apple was even sued by a woman who claimed its marketing images with the notch-hiding wallpapers misled her, as she didn't know the iPhone XS had a notch.
In Samsung's case, the company doesn't seem to be ashamed of the hole-punch cutout, as it actively called its hole-punch display "Infinity O," where the "O" denotes the fact that Samsung's Galaxy S10 phones have an "O" shaped hole for the selfie camera. (On the S10 Plus, it's more of an oval rather than a circle.)
Still, the wallpapers that come with the Galaxy S10 do seem like they're trying to obscure the selfie camera cutouts.
Check it out: