VRFocus - In these early days, virtual reality (VR) faces a number of challenges. Many of them are minor bumps in the road; no doubt the likes of the Oculus Rift VR headset will deal with audio issues and developers should be able to think outside the box for third-person solutions. But there’s one issue that could prove to be a huge hurdle for the technology. This is something that doesn’t relate to a title’s quality but to our personal health. That something is simulation sickness.