It's not only that the turbo boost of those Ryzen cpus is high and at the same clock Intel does not have a lead anymore. It's also that recent games are already pretty parallelized. There is no need to wait for the next console generation to see that effect.
Btw, the 3800X is not a good pick. It is just a minimally higher clocked 3700X. If you want 8 cores, get the 3700X, the higher price of the 3800X is just a waste of your money. But for gaming you want to stick to a Ryzen 5 3600.
[0]: https://www.pc-kombo.com/us/benchmark/games/cpu/compare?ids[...