Amazon.com (AMZN 0.32%) has now created a storefront on its website, collecting everything 3-D-printing related together in one location. The storefront features 29 different 3-D printers, including some of the top sellers, such as Makerbot, Flashforge, and Cube. In the video below, Motley Fool consumer goods analyst Blake Bos tells investors why this is a positive sign, and gives us an idea of what meaningful impact this might have on companies in the 3-D printing space, such as 3D Systems (DDD 4.14%), and Stratasys (SSYS -1.66%).