CNet is reporting that the AI upscaling feature will work across the entire game library without the need for games to be patched. "An AI-assisted upscaling mode, called PlayStation Spectral Super Resolution, works across the whole game library without any needed patch"
Not sure if this is misreporting or not, because that would be a very cool feature that Sony hasn't made clear.
Exclusive Hands-On: I Played Sony's All-New PS5 Pro - CNET