Have you ever had a VR experience where you just wanted to keep walking beyond the bounds of your room? I added a "Treadmill" movement mode so that people who own a regular exercise treadmill can use it with VR! (Note that this is not about "omni-directional treadmills" like the the Virtuix Omni or the KatWalk.)
But even if you can use a treadmill like this--do you really want to? I don't know if it's worth it, but it's now an option!
Be careful though. It can be dangerous, because it's easy to become disoriented and fall. Brave VR enthusiasts should do this at their own risk.
https://www.youtube.com/watch?v=m18GGdJqwEM
UPDATE: I made a few changes to the treadmill movement mode since the first day it was released. I properly calculated "incline," I made it so that in treadmill mode you don't slow in the game when you die, and I made a menu that shows you arrows to help you reset the center when you're setting the treadmill up.