What is a good (and short) Unity VR project demo/tutorial?

I am preparing a demo/tutorial of “VR and Unity” for my team (mainly developers) to get them excited about this technology. Is there any good existing demo/tutorial that I could use to show them a 20min high level overview of Unity for VR/AR/MR? I don’t care much about the target platform (Cardboard, Daydream, Hololens, etc). I just would like to show them power of Unity for building these experiences.

For Desktop VR:

The Lab from Valve was made in Unity: The Lab on Steam
Tilt Brush from Google too : Tilt Brush on Steam
Job Simulator from Owlchemy Labs too: Job Simulator on Steam
Pirate Space trainer too: Space Pirate Trainer on Steam