In the past few months, we have covered plenty of fun DIY projects using Kinect sensors. This project is about creating real life portals (virtual windows) using two Kinect sensors. One sensor is used to create a real-time 3D view of the world while the other sensor handles head tracking. When combined with a device like Microsoft HoloLens, you will be able to see holographic windows.
For this project, 2 x Kinect V2 sensors were used. Roland Smeenk has more info on the project here.