You’ll have the chance to opt out of the windowed games optimizations on a per-app/game basis, by the way. But we called this an optimization, so it does more than just unlock stellar gaming features. Flip model generally results in lower latency. Reducing latency means getting your game’s frames to the screen as fast as possible.  In a separate blog post, Microsoft also revealed that the Xbox HDR Game Calibration App will soon be available on Windows, too. It will feature the same three test patterns, recommended by the HDR Gaming Interest Group for an optimal HDR experience:

One to determine the darkest visible detail you can see One to determine the brightest visible detail And finally, one to determine how bright your display can be Latest Win11 Insider Build Optimizes DX10   DX11 Games in Windowed   Borderless Windowed Modes - 15Latest Win11 Insider Build Optimizes DX10   DX11 Games in Windowed   Borderless Windowed Modes - 34Latest Win11 Insider Build Optimizes DX10   DX11 Games in Windowed   Borderless Windowed Modes - 8