Valve has been Linux friendly. It says the new steam frame “is a PC” and will run Steam OS but I feel like there’s an insinuation that, like the steam deck, you can install whatever you like. I am cautiously excited at the premise of really digging in and having a Linux box strapped to my face.
Another friend has already referred to it as the Linux Vision Pro.
Edit: watching Linus tech tips review, it mentions side loading Android APKs as well
Honestly, even if it takes a really long time for a different distro to support the hardware (ARM is a fucking nightmare) just having a Linux environment will give you so much more freedom than Android/HorizonOS on a Quest.
Almost every FOSS app has an ARM version, you could comfortably survive on Flatpaks and even Distrobox for apps not packaged in Flatpak until a different distro comes along.