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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[–] 6 points 11 hours ago* (last edited 9 hours ago) (3 children)

You can already use FSR4 on Steam Deck btw, no need to wait if you want to try it out!

https://steamdeckhq.com/news/we-can-now-use-fsr-4-on-the-steam-deck-for-better-visuals-with-a-power-tradeoff/

I already use it in combination with an portable monitor, scaling the output to 1080p - that's my balcony setup ;-)

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