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
Not just this but if the compatibility layer on the snapdragon works on over ARM chips for other Linux distros, we could have desktop Linux on arm (including on new macbooks if you want).
Someone far more knowledgeable is free to correct me but that might have been the single biggest announcement they made