I fly a ton for my job and I typically use a USB monitor but obviously on a plane this isn't possible (hell, there is barely enough room for me to work on just my laptop much less two screens) - virtual screens via a VR headset would be a game-changer for me. I probably wouldn't use them daily (quad monitor setup at home, usb monitor when travelling) but would definitely spend a several hundred on a headset if it means multi-monitor on a plane
Isn't the idea of VR to be immersive so that is seems like a large real world?
Yes, but in my office I often talk to other devs, designers and QA being immersed in a different world would make collaboration a tedious task for everybody. Just being able to turn around and exchange a few words is fast, easy and human.