Yes, 3-D printing is revolutionary technology. It has opened up avenues of research that were impossible before the advent of 3-D printing. As an example, in my own research field of archaeology, scientists are using 3-D printers to make physical renderings of 2-D images in order to better interpret their meaning; they can also use 3-D printers to make copies of artifacts such as stone projectiles in order to perform studies of their strength, integrity, and functionality without harming the original artifacts. 3-D printing also allows previously unimaginable solutions to be found. For example, extremely detailed and potentially delicate prosthetics for both animals and humans can be made in a cost- and time-effective way.
3-D printing technology is certainly revolutionary. People are using 3-D printers to make everything from replicas of video game weapons to custom-made prosthetic limbs. The major downside to 3-D printing is that the machines and supplies are expensive and out of reach for many people. However, that does not change the fact that 3-D printing allows people to design and create their own objects without relying on distant manufacturers or minimum order requirements.
3-D printing helps to level the playing field for tangible goods, prototypes and prosthetics. By making it relatively affordable to create a single unit or create a prototype, this technology takes power away from large corporations and gives options to those with actual ideas. It will revolutionize the path to market for new products and inventions.
3-D printing is allowing for all kinds of new innovations. People have been able to design and print prosthetic limbs, parts for machines, and all kinds of artistic items. People can print custom made chocolates and other foods. It has been a boon for small businesses and has helped poor people.