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Here’s How That Disney 360° Treadmill Works
(hackaday.com)
This is a most excellent place for technology news and articles.
It died in my area when they dropped the amount of spawn nodes to the point where you couldn't really walk around. You had to drive pretty far at that point, and that kill let most people's enthusiasm.
I don't know if it was complaints by local businesses or what, but after that I never saw large groups walking around again.