My guess would be that it won't - Arrow Lake (different codename ~= significant process difference) is coming later this year for desktop and high TDP mobile and the vibe I'm getting from Intel's materials and media coverage is that it will have conventional non-integrated memory. Plus two of the major advantages of moving the memory onboard are more bandwidth to feed the integrated graphics and lower power consumption, neither of which is much of a concern on desktop.
PoP memory doesn’t really have higher bandwidth.
It's only for low-end laptops.
Why is higher performance only for low-end laptops?
Because that's where they can deliver.
On-package memory isn't faster. High-end laptops will have Arrow Lake with more cores and the same memory performance but it will be on the motherboard. Desktops should also have good memory performance with CUDIMMs.