If you also need your gaming PC to juggle media editing or heavy coding, the benefits are self-evident.
As for games specifically, the Core i9-12900KS comes out on top more often than not.
Its definitely the fastest gaming CPU that Intel have ever made; the fastest in the world?
Thats up to the Ryzen 7 5800X3D, but Id say the Core has a very good shot.
There is a difference, mind, between being the fastest and being the best.
And in almost every other game, theres either a negligible 2-3fps difference, or none at all.

And thats just comparing it to the fellow Core i9.
But thats up to 10c hotter than the Core i9-12900K, and the P-cores 71c peak was higher too.