Gamer's Nexus has a 5800X review up. They had one or two games where it was better than other Zen3 parts by like under than 1% and a few where it ran out of cores to leverage. But in general the 5600X is so close to it, for pure gaming the 5800X doesn't make much sense. And given the 5900X is not a lot more expensive and better(even in gaming(although it's a wash most of the time)) on average than the 5800X, the 5800X doesn't make sense as a higher end option either.
There are some niche situations where you can OC the 5800X to be the best out of all of them in a few games.