Full-body positional tracking in VR!
The Kinect VR project is a Unity3d plugin that allows anyone with a mobile VR device and Microsoft Kinect to develop their own room scale VR experiences.
Full-body position tracking data is sent over WiFi using a NodeJs server and then received on the mobile device to be used for avatar tracking in VR.
Mac users can just sit right next to their Windows friends, get the Kinect data from the server and develop their own KinectVR games with Unity. Multiple mobile devices (both Android and iOS) are able to run at the same time.