Phoronix article: https://www.phoronix.com/news/Steam-Machines-Frame-2026
Also listed here: https://store.steampowered.com/sale/hardware
Valve has already sent support for the new Steam Controller upstream: https://www.phoronix.com/news/New-Steam-Controller-SDL


Try using Steam link with a regular controller, and put it in mouse mode. You’ll be wishing for those touch pads.
Why would I ever do that? Ever?