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


https://youtu.be/dU3ru09HTng
Welp, looky there, an expansion port right on the bridge of the headset with PCIE compatibility.