I can see why AR would be more on top than VR as some applications have been released a bit before recent VR offerings. In the case of Pokemon GO, well if more than a million people have a cell phone...BOOM the app is used by a lot of people around the world.
One thing I will say about Pokemon GO is, at the time playing it, I used the AR portion for only a couple of days. Then, disable the feature in terms of saving battery life. Then eventually, I just stopped playing. All this to say, I prefer Microsoft's approach with Hololens where if I owned one, it would be used more for information purposes then gaming.
For VR, the "cost factor" comes to mind. Also, devs need to take time to understand this new technology (as is with AR) so once they get a hang of it, I am sure we will see some other cool concepts/experiences. Hopefully VR hardware and components become more affordable as well
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