I think it's just sort of a natural pushback to the hyperbole that comes from the other side - that it's going to be a massive overwhelming success and that every family will have 9 of them in their living room by May this year.
I'm not sure where you've heard anyone saying this? Certainly not on neogaf.
It's quite the opposite, where people drive by post about how badly they want VR to fail as they feel it's a threat to traditional gaming in the same way that some people see mobile gaming as problematic for enticing developers to move towards a different platform and abandon traditional games entirely.
I don't believe this to be the case nor have I ever seen anyone in any VR thread on gaf ever say anything of this sort.
Everyone that's been a vocal supporter of VR has expressed grounded, realistic expectations that VR will eventually be incredibly successful.
Nobody ever thinks it will be an overnight success and it's pretty strange how often that same exact strawman is used by "old men yelling at clouds."