There is also a reluctance to abandon the real world, even for short periods, that I think people underestimate. Even if it were perfect, there are plenty of people who just don't want to do things in VR. They want to be in the real world, doing real world things with their real world friends. I think that's where AR has the true advantage, not in the experience of the medium but rather that you aren't fully committing to the virtual world.