Valve’s Steam Machine platform is not dead, but practically deadly wound. Not that they were bad equipment, but their high prices and especially the use of the Steam OS operating system based on Linux, made this platform not even take off. Because offering a system expressly limited to play, without games is not the smartest option. That is why now Valve is developing a tool that allows to run Windows games on its operating system based on Linux.
The code found by SteamDB seems to refer to a mode of compatibility not yet revealed, complete with elements of graphic interface, a menu of configurations and what seems to be the ability to force it. This service is called Steam Play and description is as follows:
“Steam Play will automatically install compatibility tools that allow you to play games from your library that were created for other operating systems.”
Interestingly, the description of another different tool explains that users will be able to select a compatibility tool to use with games that were not specifically launched on their platforms, which refers to games made for Windows that do not include support for Linux.
These packages do not make specific reference to classic compatibility tools such as Wine or DOSBox, so Valve could be working on their own solution.
Confirmed or not, it is clear that some type of development is going on, given that you can see a large number of updates for the Valve Compatibility Manifestos for Beta tests.