"Spatial computing" is 95% just a marketing term. Understandably Apple wants to project the perception they are doing something new here. So they invented a new term. There are a few novel aspects to it, but it's honestly just VR/AR like everyone else has been doing in terms of all of its fundamental features. Which isn't to say I'm not curious about what novel things they will introduce. However what's visible so far is actually behind status quo in terms of true "spatial computing" eg: shared spatial anchors API [0] has been out for a while and lets multiple users collaborate in the same mixed reality space. So far Vision Pro doesn't seem to even support this fundamental use case that you would expect to see from a "spatial computing" device.

I do expect Apple to rapidly implement all this though and do everything better at the same time, so it's very exciting.

[0] https://developer.oculus.com/documentation/unity/unity-share...