Looking for a killer app you are looking at this to be a traditional VR or even AR device, that is not what this is.
This is about having a screen anywhere, multiple screens and turning anything into a screen and any environment into one, hence the name Vision Pro, that is how Apple are trying to sell it.
If you watched the keynote I think that was clear, everyone else seems to missing the point and comparing this to traditional headsets.
The fact when they showed gaming, it wasn't a VR or AR game, it was a traditional game on an AR screen says it all.