Tony BarkMicrosoft and Asus announce two Xbox Ally handhelds with new Xbox full-screen experience
Resplendent606It will run better on Steam OS.
Does steam OS allow for things like Nexus mods and emulators?
Yes to both. Nexus mods can be installed both manually or through an application like Vortex or Mod Organizer 2 run through Wine or Proton. You have a lot of options. Emulators run really well on Linux (including SteamOS). Checkout EmuDeck (popular application) or RetroArch (also popular).