The 3D printing industry isn’t going to have the boom the automobile industry or the internet has had. I mean it will, but in the reverse. It’s not going to create a huge job market like those industries did. It’s going to remove them faster than create them. If you can make anything that used to require a person in a factory, imagine all the factories in America and slowly all over the world being replaced with 3D printers instead of rows and rows of workers. For example, all the cheap labor in India and China making garments and knick knacks for Wal-Mart that will disappear. Replaced with 3D printers. Sure somebody will have to maintain and fix the printers when they break down, but that’s like saying tellers at a bank should all become ATM technicians if they get laid off because nobody hardly walks into a bank anymore. Not to mention all the trademarks and patients that you could violate and nobody would know you were creating stuff at home or in some factory and not paying royalties. I can’t wait until somebody uses the first 3D printer to forge currency. It sure would make it easier wouldn’t it? So while yes I can see the benefits of 3D printers, the downside to me outweighs any gains anybody could fathom.