I mean, we already have Gaming PC OEMs and mini PCs. It’d be awesome if they start shipping SteamOS, but they can’t sell hardware at a near loss + make up for it with Steam sales + guarantee hardware support in software like Valve can.
And most don’t have the volume for “semi custom” AMD SKUs.
EDIT: The only entity I could see doing this is Intel, selling an Arc Steam Machine. That would be awesome, actually.