There is another Unity-based project I am facing right now: A university class dealing with new VR experiences. Our basic idea is to tell a crime story by walking through a the bar where the protagonist has been murdered some time a ago. The player is the victims ghost and dives into the customers memories to find out why he had to die.
The result will be more of an installation than a game. Furniture in real world is interactive part of the VR experience like chairs to sit down on.
But the game takes place in more than one room and thereby the virtual space is bigger than the real. Our strategy is to reuse elements in real space in different forms in virtual. I. e. an armchair in the bar area (to actually sit down on in reality) is reused in the bathroom as a toilet to also dit down on.