Watching this video made me think, there's no reason why a VR setup couldn't similarly map the surroundings and incorporate that into the virtual world. One limitation of VR is that you can't really move around in the virtual environment, because you will bump into things in the real world (barring an omni-directional treadmill or similar). But if the system mapped out your real-word surroundings and either simulated or even just walled off any real-world objects and boundaries, you would avoid running into things, while having much more freedom to explore the virtual environment.

I'm not saying this would remove the use cases of AR, just that it could be a significant enhancement or enabler to many VR experiences.