I think the stereoscopic video from iPhone 15 pro is a practical joke: you simply cannot shoot true 3D videos from cameras that doesn't have the same IPD as human eyes. What we are going to get will be lots and lots of fake 3D videos.
It also doesn't make sense to buy 2 iPhones to shoot 3D videos.
Plus iPhone's cameras are not 180 fisheyes. The videos are pre-processed by OIS and imaging chip. They are poorly fit for making VR videos.
And who will spend $3500 to buy the Apple Vision Pro, please raise your hand here.