Nice job!
If you have a camera that tracks the viewer, you can also make the image it displays 3D as seen in this video from 2007: https://youtu.be/Jd3-eiid-Uw?t=2m46s (back then it used a Wiimote to track the head position).
I had a quick go at this a few months back using Apple's CIDetector[1], and even at 'high' accuracy that didn't seem precise enough — it was distractingly jiggly.