I first saw a 3D printer from a Brooklyn startup called MakerBot a few years ago at a trade show. I could not figure out why someone would want to own one. Today, not only do I understand what it’s all about but I genuinely feel these units are going to become a part of our lives just like any other digital device we so heavily rely on. In fact, Staples just announced that they are the first major U.S. retailer to get into the business. They are selling a 3D printer from 3D Systems.