Immersion is nice for "experiences", but AR has the potential to be used all day, just like smartphones. Besides, they'll eventually converge.

The problem is that while potentially more immersive, VR is more exclusionary. By definition it's not an experience that shares well with meatspace. So it's easy to cut off and be cut off from other people in the same room. That's fine for a teenager in their room but not so much someone living with a significant other or children.