Valve is behind the push to bring Windows games to Arm, using open-source technologies such as Proton and Fex to enable compatibility. This allows games developed for x86-based Windows PCs to run on Linux-based devices with Arm processors. The technology has the potential to expand PC gaming to a wider range of devices, including Arm-based phones, laptops, and desktops. Valve's goal is to reduce barriers for users and developers, making it easier to play and develop games across different platforms.