This is awesome! I had a shockingly similar idea to create a game that brings your actual space into a zombie shooter game! I guess I will just play yours instead :D The issue with this might be that people are too lazy to go through the process of creating the objects in their room. It works great for people like me who have a nice empty room to play in though. If Oculus could scan a room though.....
A side thought you might want to do... turn the home scaling portion of this into a tool that can be downloaded from the Unity Asset story. Sell that feature and let people make more games out of it.