Ironically, the Apple Studio Display has a A13 processor inside it for camera and other processing. Misses your $500 price point by a long way though!
Seriously, though, in the context of webcams, the Studio Display is kind of a counterpoint to "just rip a camera module out of a few-year-old smartphone and it'll be terrific". That's pretty much what Apple did here, and it's rather notoriously, ah, not great. (I have one, and I think it's better than some people give it credit for, but I know I'm comparing it to Apple's laptop webcams, which have historically been pretty terrible.)