If I could watch my daughter's first step in full 3d, I would be happy to pay the $3k and more.
I know you can do it right now with insta360 or whatever but I think there is a bit of a learning curve and it just isn't it that seamless.
Being able to record directly from the headset and play it back exactly how you saw it would make things much simpler and WYSIWYG and may be the reason for mass adoption