Having your "workstation" with monitors floating around you in space wherever you're sitting or standing with zero cable management. Whether you're at home in the comfy chair, at a treadmill getting your steps in, or at a hotel on a work trip.
Once the resolution and UX gets good enough a lot of people would love to have their entire office setup replaced by a portable wearable with next to zero cable management. Doubly so if that opens up space in your expensive SF apartment.
That's all good in theory, but we're still a long, long away from this being the future, let alone a future that everybody wants.
I’d probably do more development in the meta quest virtual desktop environment if my primary occupation these days wasn’t writing software for the meta quest. It makes it difficult to iterate when you constantly need to flip to a mode where your monitors disappear.