If you need an easy full-screen gaming experience with Linux, perhaps with your main big TV then GamerOS looks to be the next best thing to SteamOS (since Valve aren't currently working on it).
GamerOS, despite the naff naming, is actually genuinely good. An up to date Linux distribution ready out of the box for a somewhat console-like experience. GamerOS 20 was just released, bringing the usual upgrades to things like the Linux Kernel to 5.8.10, Mesa drivers 20.1.8, NVIDIA drivers 450.66 along with updates to their own software and RetroArch 1.9 is included too.
Apart from the usual assortment of newly "certified" Steam games (what they've tested working), it also adds in support for Sega 32X, Sega CD and the Epic Games Store. There's a few issues they noted though like SEGA CD needing a BIOS supplied for it and the EGS doesn't yet have working gamepad support.
How GamerOS works is actually quite interesting as they built a tool called Steam Buddy, which is a web-based management system for installing non-Steam software.
Steam Buddy can handle Flatpaks from Flathub which GamerOS 20 expanded the amount supported, and this Steam Buddy feature is how they're handling the Epic Games Store too. It does this through the use of Legendary, a free and open-source Epic Games Launcher alternative we covered before here. So far, it seems Epic themselves have left Legendary alone which is nice to see. A fun example of open source in action though, with Legendary now enabling a Linux distribution like this to hook into the Epic Games Store which has no official Linux support to run the games through Proton.