This isn't a "killer feature" that pushes HTC Vive as a VR platform above all others -- unless you have a brightly painted green room, plus sufficient cameras and hardware. It is, however, a very smart way to illustrate why modern-day VR is so much better than its '90s ancestor, and how the immersion at work goes far beyond existing video games. That's very, very important if virtual reality is to become the hit many have predicted.

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