While googling I ran across Homeplay, a less known project of collectif fact. I like the concept a lot!

Spectator has a trackball in a hand and stands in front of the model of a town. On top, on the roof of the building, images are projected, those can be images of inside apartments, looking from the top, or webpages of furnitures products (trademarks). Spectator can move from one to the other apartment or go downstairs. Furthermore, spectator can create his own apartment by drag and drop words meaning objects, furniture or actions. This artwork is a reflexion about representation modes connected to physical, mental and virtual architecture.

The installation is explained here.