HoloLens and Windows Mixed Reality unlock a whole new world of interactions between humans and computers. This technology also defines how collaboration for augmented and virtual reality might look like. Holograms being displayed to users don’t need to stay private. By leveraging device’s sensor data and applying multiplayer network techniques, users are enabled to render holograms at the same place in the real world across multiple devices. This session provides an explanation of how it works, explores available approaches to the problem and shows possible scenarios for applications.