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
I have the first controller, just dug it out the other day because I thought I was going to be able to use it on my new tablet, it still sucks. I never could get used to it, but it’s a far sight better looking then this thing.