Series X uses the whole power of the CPU and GPU when running BC games, so even if a game is locked to 30FPS, the extra horsepower will help with times when the framerate would normally drop, helping it run better. This info about the PS5 doesn't clarify that this is the case for BC games on PS5, so while some games might take advantage of the extra power, it remains to be seen if that is the case for all BC games. I hope I'm wrong, but their wording of "Select PS4 games will benefit from the PS5 console's Game Boost" has me skeptical. Hopefully this Game Boost will work on every BC title and I'll be proven wrong, but again we have yet to see any PS4 games running on PS5.