There are several companies working on artificial locomotion technologies. One of them is Ekto One, a robotic movement system based wearable technology company Eckto VR. Made of tough carbon fiber material, the device resembles a pair of futuristic moon boots. When paired with specially designed shoes, users can physically walk, run, duck, and jump in VR regardless of available space.
Each boot is equipped with a pair of Vive Trackers which allow the VR headset to track the wearer’s feet in real-time. As they walk forward, motorized wheels located on the bottom of each boot delicately reposition the wearer back to their original starting location. The wearer is allowed to take several steps forward before the boots are activated so they can better acclimate to their virtual environment.
More information:
https://vrscout.com/news/these-futuristic-moon-boots-let-you-walk-forever-in-vr/