Plus, there are economies of scale: that same device can be used for just about every room / configuration, instead of having to create 100's of unique versions of the thing.
The hoped-for outcome for 3D printing is that it will bring the cost of a custom faceplate to maybe 5x times that of a generic faceplate instead of 100x. Of course the hardest part would be the software to turn the room layout into a 3D printed faceplate.
