I’m skeptical the Facebook would bother to invest so many billions into VR just for the chance of being part of the competitive game console market. It makes sense to think about how it fits into the long-term strategy for their main cash cow, ads. If there’s a future where internet/app usage hours shift toward VR, Facebook doesn’t want to be left in the dust like Myspace when users switch to a new social network. Even if they can keep users on a Facebook-owned VR app, they don’t want to wind up paying a 30% tax to some platform owner.