In this deep dive on mixed reality (the visual kind, not the Microsoft Misnamed Mixed Reality inside/out tracking kind) we talk about the blockbuster investment in Sandbox VR by Andreesen Horowitz, its implications on the location-based VR business, and why their mixed-reality feature is a key to their success. We also go into the new Mixcast Moments VR Marketing Platform from Blueprint Reality, and how it solves some of the biggest challenges for operators of location-based VR attractions: converting spectators to ticket-buying customers; and increasing the virality and effectiveness of social marketing.