What is VR?

Recently, VR's made a striking comeback. Last year, Facebook acquired Oculus, the frontrunner in VR hardware, for $2 billion. Since then, we've seen aggressive movement in the industry from Samsung, Sony, and Valve, to name only a few of the companies that see potential in VR headsets.
How has VR risen from the dead? On this week's episode, The Verge's VR expert Adi Robertson explains the history of the VR and what circumstances led to the crop of VR projects in development at many of the world's biggest tech companies.
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