https://www.theregister.co.uk/2018/08/30/apple_sees_the_augmented_light_and_buys_holo_glass_tech_startup/

Apple has reportedly snaffled holographic glassware biz Akonia Holographics for an undisclosed fee, presumably to use its tech in augmented reality gadgets.

Akonia is a six-year-old company with roots that extend back to InPhase and its holographic optical disks. It moved on from holographic storage to displays, and has developed the proprietary HoloMirror, which allows transparent smart glass lenses to display full-colour images with a wide field of view.