It would be really funny if the PC update went full FSR 4 Redstone and made the path tracing work well on AMD. Even FSR 4 support would be good for AMD.
That said, CDPR has been very pro Nvidia for a long time now.
I see the main focus of this update being some added content, not necessarily tech upgrades. Though PS5 Pro support would be nice to see. Would be interesting to see how that would improve things.