Detecting gravitational waves is a complex undertaking; the gravitational interaction is, in fact, the weakest in the universe. Current gravitational detectors have required cutting-edge, new and often innovative technological solutions. This will be even more true for the implementation of a pioneering project such as the Einstein Telescope. The technologies that will be designed and developed for the ET will need to improve detector performance by at least an order of magnitude over current, second-generation instruments to enable the ET to observe a volume of the universe a thousand times larger than we can observe today. This will be achieved by successfully overcoming a series of technological challenges that the scientific and business worlds will need to tackle together. This collaboration will foster, significant and sometimes unforeseen spillovers, both in industry and other sectors, for the benefit of society as a wholth. With the ET, a veritable chain of innovation will be created in many areas.