Back a billion years ago a friend of mine tried to start up a company visualizing architectural plans in unreal engine (very early, like maybe unreal 1 or 2 .. he tried it in the quake engine first), years later but still a million years ago while working for a retailer I set up a demo with the early oculus rift dev kits allowing us to visualize new department store 'pad' layouts and new fixture (shelves, seating, racks) designs... using unity (the unreal vr support wasn't in yet).

I imagine at least the architectural stuff just happens now.