The simple truth is that the layman - that is, the average consumer that hasn't spent the last few years playing around with Oculus devkits and browsing industry forums - knows next to nothing about the raw technical differences between, say, Google Cardboard and Samsung's Gear VR. The idea that a typical consumer would so readily drop several hundred dollars on something they know so little about is more than a little absurd, and is VR's biggest problem going forward to mainstream use.