CD Projekt RED announced on X that starting September 29, along with the "remaster update" for The Witcher 3: Wild Hunt, the Xbox version of the game will receive Xbox Play Anywhere support, allowing game owners to get the PC version for free in the Microsoft Store.
Xbox Play Anywhere allows owners of the digital version of a game on Xbox to get the PC version for free in the Microsoft Store, maintaining shared progress, achievements, and other data across platforms.
However, this change will not affect the PC version of The Witcher 3 on Steam and other platforms where the game is already available.