It's not a VR headset and it's not an AR headset. It's something else. It's reasonable to give your specific vision of these technologies a more human name.
Also, it's something that's going to be released in very limited quantities in a year from now. And it was announced at a developer conference so developers can start to prepare apps. We've only really seen a preview and the technology is in the earliest stages.
There's a ton of stuff they only mentioned in passing - like their proprietary camera format and cameras that can record the world in immersive depth-mapped 3D. Those will likely be licensed out to studios and sports leagues which can prepare content for Vision Pro.
Yet. They've set it rolling and so far own a perspective separate to AR/VR. Leaves the competition brawling over headsets for a still-to-be-defined VR concept while they pitch customers on their thing. Computing. Ties in to work. Easier to justify spending $x000.
Not just that. It also makes the Vision not just an ill-defined VR product, but also a 'MacBook Air or iPad for on the go with far more screen real estate'. This pitch resonates with pro users who are not necessarily interested in VR. The initial reaction of Apple-using friends/family is: I'd probably buy this as a replacement for a MacBook + external screen. It also makes the pricing more acceptable - it's about the same prices as a non-mediocre spec'ed MacBook Air + Studio Display.
Then I believe they misunderstood the presentation, since this device is not a replacement for a MacBook, since it just can't run the same software. And even if it could, it would be much, much slower at it, since it has to spend huge compute resources on constant refresh of two 4k+ screens plus advanced vision algorithms to process the camera input and overlay the 3D graphics onto it in the expected locations.
You could have said all of things about the original iPhone. It did similar things to a lot of existing smartphones at the time (send email, play music, browse web, make call).