Apple has managed to combine AR and VR, by simply re-creating the AR inside the VR. The idea is simple but profound. However, for a company that prides itself on "shared" experiences, the VR is for "lonesome" experiences (watching a movie, watching vacation photos, etc) in some cases, but bang on for others (especially at work) This will spurn the industry, just like the iPhone did, and hopefully, we will have a lot…
I think what's stopped other companies is that it was too damn hard; not that it wasn't the obviously superior way of doing things. (Obviously superior: render AR onto VR.)