avx512 is a spectacular instruction set and absolutely speeds real world workloads up a ton, and makes it easier for compilers to auto vectorize too. the only catch is that is is new so not many things leverage it yet.
Nobody is even thinking about leveraging this stuff without understanding things like this anyway.
In not saying you can't find something in a game to speedup with avx512, but that you wouldn't want to do that in the first place.