Already a $4 billion industry, and projected to reach $18 billion by 2020, 3D printing appears to be the next disruptive technology. It’s a disruption because 3D printing is replacing manufacturing practices that have been around ever since humankind started using tools.
As to what makes 3D printing different, read this excerpt from 3DPrinting.com:
‘The creation of a 3D-printed object is achieved using additive processes. In an additive process, an object is created by laying down successive layers of material until the object is created. Each of these layers can be seen as a thinly sliced horizontal cross-section of the eventual object.”