There's a big difference between how Google and Oculus approach VR. Oculus' position is that it's bad to show people VR experiences that are likely to make them sick; they refer to it as "poisoning the well". They're very cautious in how they label things, and they've invested a lot of effort and talked a lot publicly about how to get things exactly right.
Google's approach is, instead, to keep expectations down; they call it "cardboard". And, well, what's going on in the Cardboard world kind of freaks me out, because Cardboard's documentation never seems to mention the problems, Google never talks about the work that needs to be done or the problems Cardboard has, they just sort of pretend that VR is VR is VR. It's like they're really trying to poison the well (though I don't think they'd actually do that intentionally).