This video went majorly unnoticed when it was initially published a month ago, but /talk member OsirisX pointed out earlier today that he has been able to run Steam on the PS4, with games running at reasonable framerates.
This is not SteamOS on PS4 yet, but it’s still Steam and its games running on your console.
In the video, OsirisX showcases game Bastion, running from Steam on the PS4, at a playable framerate (OsirisX states most games run fine with mid to low graphic settings).
This all works through a build of ARCH Linux. OsirisX gave the precision that he compiled and installed the 3D Drivers provided by Fail0verflow as part of their Linux PS4 project. (these drivers’ patches can be found here).