The recent introduction of consumer virtual reality headsets has got me thinking about potential applications of VR to human space exploration, particularly the psychological issues related to being extremely far from Earth (or at least far enough to not be able to see features on the Earth). A sufficiently advanced VR headset could be used to 'transport' astronauts back to Earth, either with specially made VR experiences or what would amount to HD google street view. If you combined the headset with a treadmill, you could allow astronauts to take 'walks' on Earth.
What do you guys think about this? What are some of your own ideas for applications of VR tech in the space sector?