So pray tell, what do investors see in it? As a geek I see a hobby horse.
They are investing heavily in AR/VR and they have a proven track record in new product categories e.g. smartphone, tablet, headphones, watch.
Once the technologies improve such that the glasses/headsets are light and small enough then it's going to be something you can bring and use everywhere. And then the popularity will increase which in turn will attract developers. Repeat this cycle a few times and you have another $100+ billion App Store business on your hands.
I don't think it makes sense to conflate those two distinct use cases as the tech is different and user experience is vastly different as well.
Can you name a "digital space" or is this still vapor?