First of all, because they are Awesome! The uses for them are only limited by our imagination. Already, 3D printers have made a huge impact in the medical field; printing prosthetics, replacement bones, and plenty of other helpful bits and parts to improve health and quality of life for many patients. 3D printers have been used for toys, cars, food, and anything else you can think of. Now, with more companies building 3D printers, the price is getting more affordable for everyday computer users. Hopefully, within the next few years, we may all have one at home to create whatever we can imagine. I am already saving up for mine!