Holo
Millions of nano lasers in all primary colours were all around. Once they crossed theit beam a colour point was made. Millions and millions of collor dots forming a picture.
In the house there were sensors on every unit. It had to be that way. Once you started snoring on the chair or in the bed all units would just went off. Saving power that's what it was. If you waked up all you had to do is say "power" and lights will light first. Afterwards with voice commands you either turn the holo tv, the surround radio, or the holo personal computer.