ExtremeTech postulates Steam Machines and Valve's SteamOS may be dead in the water. While Valve and SteamOS did great things for gaming on the Linux platform, the site concludes shipments of Steam Machines are abysmal and that the platform is trying to solve a problem that didn't need solving:
The entire push behind SteamOS was predicated on the belief that Microsoft might lock game installations to the Windows Store or force developers to sell through its own platform. Such a maneuver would have been a catastrophe for Valve, which currently controls a significant share of PC gaming revenue. When that threat failed to materialize in Windows 8 or Windows 10, some of the fire went out of SteamOS. It doesn’t help that the OS is also much slower than Windows 10 in many games, even when testing titles based on Valve’s Source engine.