Virtual reality is coming. We gamers spend quite a lot of time in new worlds, but for all their graphics and sounds, video games aren’t virtual reality. Yet. New technologies like Google’s Glass and John Carmack’s VR goggles project are leading the way, while walk-in simulation machines are being built for big companies and the military. That’s just the tip of the electronic iceberg. Once virtual reality is here, the real question becomes what type of VR is right for you? io9 has the story.