A bet on regular VR is conservative in the sense that there are existing games, game engines, game fans and game companies. All of them used to 3D and fancy graphics cards and spending money.

Given the choice between spending $X on porting Skyrim to VR, and spending $X on an all-new AR game, and spending $X on trying to find an unmet industrial need AR can fulfil, I know which I think is the safer bet!