Despite nearly two years of hype around the Oculus Rift and HTC Vive, there are still short of 2 million of those high-end virtual reality headsets in consumers' hands today. Even adding in the 2 million headsets for Sony's (NYSE: SNE) PS4, that's still only around 4 million devices out there offering a fully immersive experience. To take the VR industry to the next level, companies need to make their technology both more accessible and less expensive.