Short term, I think the biggest industry use will be in training, and mainstream (outside of games) will be in 360 video for things like sports.

Long term, I think AR will overtake VR but will only go mainstream when the tech miniaturizes enough to not be visually invasive. Nobody wants a big clunky headset on while they shop.

Those are my predictions anyway (and sound a lot like a lot of people's predictions too, I'm sure).