Yeah I think it will take another couple of years for VR to become mainstream (i.e. smartphone mainstream). But I think the Oculus Go is the beginning of the mainstream adoption (maybe like a Palm, and we need 1-2 years more for the "iPhone").

From my experience, VR is a huge gamechanger (a new paradigm that will enable a lot of new innovation) whereas AR is also cool but doesn't have that new paradigm potential (like e.g. the internet, smartphones etc. did).