Hi , you are correct. I am using unreal engine to make the holographic projection interactive. Right now it is a simple setup but i have received a positive feedback from clients, they will always be looking for something new and as estrange it seams there are a few clients that are not that hipped up for vr headsets.
We will see how it evolves but i hope that this trend that it has been happening with arch-viz and other industries ends up evolving and i gets to the point of an standard.