In the following video, Motley Fool industrials analyst Blake Bos looks at the most important news coming out of the 3-D printing world right now. He discusses 3D Systems' (DDD 0.57%) new partnership with Staples (SPLS) and tells investors what to follow to see how well these printers contribute to the company's bottom line on the retail end. Blake also looks at General Electric (GE 8.28%) and discusses this massive company's plans to incorporate additive manufacturing into its production line.