There are a series of possibilities happening together really quickly and new avenues opening up for exploration.
I recently read about the first 3D printed room (http://www.dezeen.com/2013/06/26/digital-grotesque-the-worlds-first-3d-printed-room/) and I see the revival of intricate details that have become very rare since the cost and time of labour has become an issue.
and the first 3D printed house (http://www.popsci.com/technology/article/2013-08/watch-assembly-3-d-printed-shack)
In continuation to what I started to mull over earlier, there is a need for an interior that can be modified to rapidly changing needs of a building to be in sync with a rapidly changing world, this technological advancement is becoming a great cause of sleepless nights.
I am now beginning to wonder if 3D printing can somehow be combined with nanotechnology to create interior walls and partitions that have 2 or maybe 3 types of presets that can be changed as needed. Dr. Michio Kaku is a physicist, he may be either a visionary or a mad man but I seem to like his proposals. He thinks it may be possible to incorporate nanotechnology in objects that change themselves into whatever you need them as usage requires, for example your table could change itself into a chair or any other type of object. I imagine there would be some presets that can be programmed into the object and we would be able to make a choice based on that. So maybe we can have different wall types programmed and preset to change with need, if a room requires more privacy we would be able to switch the wall to an acoustic partition or increase the fire resistance if we need to store valuable and sensitive material.
With 3D printing, perhaps we can change an entire floor plan and do away with messy construction and save time. How long before we can save money is a different matter altogether, but the possibilities seem endless.