Okay, rant: Can everyone PLEASE stop talking about augmented reality and virtual reality in the same sentence? I'm mainly speaking to the general technology press which does this CONSTANTLY. *glares at TWiT*
AR devices need to be light and portable. VR devices need to cover as much of your FOV as possible, portability be damned. AR adds to the world around you, VR creates an entirely new world.
I agree that in 10-15 years, AR and VR experiences will be provided by a single device, but that time isn't now, and even when it comes, the two will continue to be completely different experiences. The only real similarity is that both use a head mounted display if you ignore Project Tango, Miku, Pokemon Go, that thing on the 3DS... their names consist of a futuristic sounding word followed by "Reality".
We can argue about that last point. What matters is that right now, talking about VR and AR in the same sentence is not a useful conversation. Contrasting the two does not tell us anything interesting about either technology.