Man, I don't even bother using the ultra-wide monitor on my desk. The screen on my laptop can already display orders of magnitude far more information than I can easily process at one time. Even with contexts where I'm comfortable managing windows/buffers manually (e.g. emacs) there's simply too much space to easily manage. What do you do with all that space? Is it just pulling up every possible resources at once so you don't need to bother doing anything more than moving your eyes to switch contexts? How often are you switching contexts?
And yet I have people constantly telling me how they have four monitors set ups and still not enough screen real estate… and this is why they don’t like the Vision Pro, which can only give you one big ultra wide max.
I find the extra space useful over just a laptop screen for coding - I can have a simulator to one side, and a coding window open with a good amount of space for metadata sidebars, along with a window or two for code documentation.
Where it really shines though is for photo review and editing. There it is spectacular to have so much space for image review even with a good number of adjustment controls up.
The other thing the screen is great is for use on a plane. No-one can see what you are working on, but it's also a kindness to others since your laptop screen is totally dark. It was really nice working on an international flight with the AVP and a laptop.