We heard your feedback and requests to bring the Xbox HDR Game Calibration app to Windows. In a not-so-distant future, you will be able to improve color accuracy and consistency of your HDR display via the upcoming Windows HDR Calibration app.
The link you provided directs to a Windows HDR Calibration Application on the DirectX Developer Blog. This application is designed to enable users to calibrate HDR displays on Windows systems. It offers features that allow users to adjust settings related to brightness, contrast, and color management, ensuring optimal HDR display performance.
If you are having trouble with HDR display calibration or need assistance with using this application, feel free to ask for help or further information!