That's pretty much obvious, given Sony not only produces the VR goggles alone, but also the unified hardware that's running it, and finally and most importantly - they actually make games for it. PSVR is basically the one and only VR set that has rights to exist, because it's a complete ecosystem, owned by one company, whereas all the other VR producers care only about selling the VR googles and that's it - there's PC, over which nobody has any control, so it's impossible to optimize the software for it, and they don't make games for their own hardware, nor they intend to.
I read delusional comments in the "VR is stalling for no reasons" thread stating that "the technology is not there yet", "wait till the right technology shows up" etc. and that's exactly what I mean - those manufactures care only about selling the googles, so they will keep fooling naive people that higher resolution or refreshrate will bring better experience, while going all the way up to 2x64K 240Hz googles will still be a softwareless VR, and software is where the actual experience comes from.
Sony on the other hand due to all mentioned reasons can basically monolpolise entire VR market, they already have all the puzzles, so if they implement VR directly into PS5 and price the console low enough, this might be the moment when the VR will take off. However, there's also risk that it will go in the opposite direction - as many VR threads show, pleople have literally unlimited reasons to dislike VR, or simply not get into it, so going heavily into VR might turn away people from Sony's console and opt for MS instead, which in the end result will only decrease the potential VR userbase. Curious to see how it will end up.