https://www.uploadvr.com/watch-iphone-15-pro-spatial-videos-on-quest/
You can already watch iPhone 15 Pro 3D 'Spatial Videos' on the headset you already own. Here's how:
You can convert the video with an App called Spatialify (TestFlight)
I unironically love the idea of spacial video, the only problem I see is accessibility for actually viewing them. To that end this is good news! No one I know is going to buy hugely expensive Apple VR goggles but cheaper VR headsets are within the realm of possibility.
Just wait, they will come out with a version that will be more targeted to normal people.
The Vision Pro is more a less only a developer platform to develop the apps for the cheaper versions.
Not saying that’s the way to go, but I watched the side by side YouTube video in 3D on my regular iPhone by simply looking at it blurry and then moving it into position if you know what I mean ^^
It’s not comfortable for longer videos though :D