While the support itself doesn't necessarily mean OS-level toggle like the Steam Deck has right (which I believe is still at FSR 1), it still could be a nice touch for the titles that choose to implement FSR 4.

Maybe the community adds the OS-level support unofficially, somewhat similarly to Lossless Scaling right now (although perhaps for free). This is just my uneducated guesswork, please see this comment for proper expectations:

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[–] 3 points 15 hours ago (2 children)

Proton-CachyOS also can upgrade FSR3 games to FSR4 on RX 6000 and 7000 series of GPUs, and it works outside of the Steam Deck platform.

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  • [–] 1 point 9 hours ago (1 child)

    Optiscaler (with Windows games) also works if you need further tweaks or run into compatibility issues with the Proton level support.

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