I don't know what the advantage of using VR would be. You can certainly create realistic 3D CAD models right now and the person driving the keyboard can take you through it, cut cross sections, zoom in and out, with the result shown on a big projector screen. I suppose it might serve some gee-whiz factor for selling clients if they can be immersed in it but I don't see it serving an engineering purpose. Seems like a solution in search of a problem.