The Xbox One S may boast slightly more processing power than the run-of-the-mill Xbox One, but Microsoft insists that it won't have any impact on the performance of games.
Xbox planning lead Albert Penello says that the additional CPU and GPU enables HDR, but will have "literally no impact" on the performance of games. "When we made changes to the box for 4K we unlocked a little bit more processing power to enable HDR. That's it. It's exactly the same architecture as the existing one," he told Eurogamer.
He added, "I promise, it won't even show up. It will have no impact on games at all. Literally no impact. They will be identical. It's nothing, it is literally nothing."
The addition of HDR means that games may look better though; Gears of War 4, Scaleboundand Forza Horizon 3 will benefit as a result of this capability.
If you want a performance boost, however, you'll have to wait for Project Scorpio next year. Microsoft says that this will be the most powerful console available on the market, and promises the best visuals and resolution for games.