Thanks for clarifying! You are right, I thought they sold complete systems with just Steam OS, like the Steam Deck, but as a console. Seems like I was wrong around it.
Just to make sure: I'm aware one can also use the desktop mode on SteamOS, but it's not really necessary.
For some reason, I was reading "stuffing cats" in the headline and was a bit confused. I'm happy I was wrong and the cats are alright, but it's still bad news.