In the 90s, Virtual Reality was the thing. It was assumed it would be the future. But like anything else, the future always gets sidetracked by something nobody saw coming. It died. But now we have the technology for a really immersive VR experience. But you rarely see it anywhere. There is a stigma going back the VirtuaBoy. But now it's becoming a reality: https://developer.oculusvr.com/ Why have 4 monitors, displaying at least 1920x1080 EACH, when you can have that at a fairly low resolution? So far TF2 is going to support it. I hope more do.