Head tracking with Kinect is very good.
Besides head-tracking, I think we do not need an expensive treadmill if you only add 3 functions to walk, run and jump.
Is it possible?
Please see immotionar(http://www.immotionar.com/en).
Immotionar uses two Kinect sensors to perform 360-degree tracking, but if we do not use controller tracking as a kinect, we can use a single sensor.
Vr treadmill has become a new market.
How about this?
Yes, I have also seen that.
However I can only implement something that will map to OpenVR. I cannot see any such functionality in OpenVR like running or jumping as such.
What I can do is to add body tracking and I am gonna do it in next 2-3 weeks.
So for games that support it, you will have 3 vive 😉 trackers taken from Kinect.