Apple's compatibility with other family/close friends which is the main pull for me. Airdrop, Find Friends, Facetime, Shared Family iCloud etc. Not to mention the compatibility with other Apple hardware. I know it's not impossible to work around that with Android/PC but having these things all just sync up goes a long way.
Back on the subject of VR, the inevitable interoperability of Vision Pro with the rest of the Apple ecosystem will also be a big pull. One of the big limitations of the Quest is just that, it sort of exists in its own 'meta' universe. It doesn't seek to be compatible with other stuff. Meta doesn't even have any other 'stuff' in terms of hardware. It's fine for what it is, but I've not seen a great deal outside of games, watching movies on a virtual screen, and interacting in some virtual worlds with 'avatars' (which seem to be mostly infantile teenagers). Having owned a Oculus Go and experienced these limitations (and how uncomfortable having a weighty headset on is for any length of time), I can already see many advantages with the Vision Pro.