A small tracker about 2 or 3 inches long could be developed that can attach to a band, or slip onto a belt. Place one band on each foot, and one on each side of your waist to help better identify your waist height. If you wanted to, you could even place one on each knee and elbow. Simply pair the tracker to the Oculus and identify which part of the body it is. I feel like that could help with full body tracking for a full body vr immersion experience
But it would be great if Oculus could produce a small tracker, similar to the Vive tracker but hopefully smaller. This way you could have hand tracking where the controller buttons are not needed. I would like to use this as a solution alongside the Leap motion to keep hands tracking when they cross over.