Only use when Windows Automatic Color Management (ACM) is enabled. That way we know Windows will automatically convert from extended sRGB linear to the appropriate color space for the display. When we previously tried this there were some issues, but I think it was due to ACM being off. This has been confirmed to work on NVIDIA and AMD, and Intel is not expected to support this (yet) for the same reasons there is no HDR. Pull Request: https://projects.blender.org/blender/blender/pulls/146041