Valve has officially announced that the SteamOS operating system will be available on third-party devices, not just the Steam Deck. The first such device will be the portable console Lenovo Legion Go S.
Company representatives stated that they are preparing a beta version of SteamOS, which will be supported by third-party portable devices.
Ahead of Legion Go S shipping, we will be shipping a beta of SteamOS which should improve the experience on other handhelds, and users can download and test this themselves. And of course we'll continue adding support and improving the experience with future releases.
Among the main features of SteamOS, Valve highlights a fully optimized gaming experience similar to that on a console. This operating system is based on Linux. Most Steam games support this OS thanks to the Proton compatibility layer. If desired, third-party game launchers can also be installed on SteamOS.
As a reminder, rumors suggest that Valve may be working on a new generation of Steam Machines—a console-style gaming computer.