My friend was done with windows and asked me to install a linux distro on his laptop. I chose Linux Mint. Install went fine.
Last night I decided to try to put Steam on it.
I went to the Software Portal and searched for Steam. I installed the fist program (it had 200+ ratings). It worked fine. Steam launched, he logged in, and we started installing games.
The first thing I tried was Tabletop Simulator, I installed via Steam in the normal way. It installed and worked. Game launches, mic works in-game, closes okay too.
This is the first time I have used any linux distro and had Steam and the game work right away. I typically have to run things via the command line or edit cfg files. I was impressed and surprised.
I am still not going to try to run things like GTA or Skyrim, too much work, but all of the SteamOS+Linux games we tried worked fine.