Will Metal 3D Printing Change the World?

Just a couple articles talking about how 3D printing (in particular metallic 3D printing) will change the world.
http://www.etcourse.com/will-metal-3d-printing-change-the-world.html
http://www.forbes.com/sites/ricksmith/2015/06/15/3d-printing-is-about-to-change-the-world-forever/