I would like to be able to use AR/VR devices (specifically the HoloLens) as portable planetariums. Starry Night could be run on a traditional PC with all settings (time, date, location, objects of interest..) determined by the user of the PC. The AR/VR devices would do nothing but determine which direction the user is looking and then display the appropriate content (what would be seen at the time, date, and location set on the traditional PC).
I think this would be particularly cool on the HoloLens because then the users could walk around the 3D scene and point out cool features to their friends.