The objective of this project was to build an enterprise scenario with HoloLens with integrated IoT. We focused on the connected scenarios and building a holographic with a 3D Model of a building. With respect to the holographic application, we focused only on Gaze and Gesture; however, there are several enhancements that you can do to extend this solution--here are a few of them.
You can extend this application by adding Voice Command. Extension scenarios could be, for example, a command to display details of a room number and your holographic app shows the details of the room.
You can extend this application by adding the capability to place the building 3D Model on any surface, such as a table top or floor. This gives a more visual experience, rather than a 3D Model hanging in the air; that doesn't provide an impactful, rich experience.