This product, and every similar headset to follow will never appeal to a mass market for daily hours-long usage. It's uncomfortable, isolating, constraining, expensive, anti-social and its use cases are at best temporarily impressive but quickly grow old. The entire product category simply sucks. I'm sure the incidental 3D movie experience is great, but most people don't watch movies every single day for hours on end…
But.. that's the point. Of course 90% of the time you look right in front of you. Everything else would be tiring.
The advantage of a multi-monitor setup, or spatial computing with Vision Pro, is that for those 10% of times when you need to do something else, that other window is right there. No need to alt-tab through a bunch of apps to find your log file viewer. It's always there, just a glance away, and you can cross-reference multiple windows without them overlapping another.