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. This is just my uneducated guesswork, please see this comment for proper expectations:

https://lemmy.ml/comment/28222346

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[–] 1 point 1 month 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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