Just a heads up-- there's already an app on Testflight to convert Apple's Spatial Video to a format playable on a Meta Quest headset, etc.
I've tried it out-- it looks fine, but as expected, it's much worse than a dedicated 3D camera. The quality is really quite poor compared to existing stereo 3D video since it's only 1080p, and the framerate is too low (you really want 90fps or above...preferably 120). The 3D depth is shallower than what it should be due to the camera lenses being so close together. But... for a built-in feature on a phone it's ok. It's cool to be able to shoot 3D stereo clips on the fly, even if it's the most bare-bones basic version of it that you can get.
I will say that the glowing reporting from journalists who tried this out is VERY VERY exaggerated...

😂