Hmm so I had this idea.... don't laugh!
We are building a new house and I was thinking of having my PC useable in three rooms... the office, lounge and bedroom. I was going to achieve this by simply leaving the pc (its just a mac mini) in the office (where it will get used mostly) and then mirroring the image on the different displays. I figured when not using a display (i.e. the bedroom it would just be turned off). For control I would just take the bluetooth keyboard/mouse into the room i wanted to use the pc. All the rooms are close (<10 meters)....
Am I dreaming! Would this work as I have described it or is there another solution to this?