Virtual reality is touchy. It's every persons dream to be able to enhance their life beyond the standard that they could normally achieve. We all wish to be in video games, but the way that it currently is, it's more of a gimmick to sell more of a product, because all you can really do as an average game developer is rig the VR system to your game which leads to motion sickness most of the time, or make a stand still simulator where you stare at cool things. It's very hard to say how long it'll take, but I believe that eventually VR will reach the revolution that we all dreamed of like every kid dreamed to have a hoverboard when they watched back to the future, but in this state it's a gimmick if it's sold now. Not to say that they aren't making great strides in the study, but that's the study not the actual production and selling of the genre of game.