I come from a family where my granddad and uncle were painters and wallpaper decorators. I helped a summer with one but it wasn’t really for me. I do like collecting nice images and cartoons. So i was thinking of creating a webapp where I could upload image collections into and create an unique wall paper mosaic texture. For the toilet, I would definitely do something with cartoons. For the bedroom, something with black-white erotic pictures. For the hall, something more experimental. For the bathroom, a cloud and sky collage.
I saw an awesome mask. I always found them fascinating. Not because of the object itself but for the mystery that the person who is wearing it is surrounded with. I also saw a great art object remade in miniature scale by a 3D printer on QI once. Previously, I also had the idea to create a 3d printer for chocolate.
These three examples just give you a tip of what a 3D printer is capable of. What if someone would create a market place in which patterns can be downloaded and roll out a 3D printer directly. Every pattern could be under some kind of Creative Commons license.
The platform itself makes money by selling 3D printers, 3D printing raw materials and a commission on each downloaded pattern (cfr. online image and font libraries). The creator of a pattern gets paid per use.