When true reproduction of the old masters becomes reality
The 3d printing advancements are triggering a revolution in the way some of the historic painters of the world could be experienced. While 3d printing makes it possible to reproduce paint strokes to the microlevel it will probably become possible to have a nearly exact copies of any of the master pieces on your own wall for minimal cost.
One of the best known masters that would apply for this new technique is van Gogh with its thick brushes of paint. The van Gogh museum now even has test runs to reproduce some of its own collection.
So when it becomes reality it will probably become affordable to have a nearly exact copy of any masterpiece you always imagined on your ceiling. Not to forget the possibility for scaling the art in such a way it would perfectly fit in your interior.