The trend to an increasingly globalized world, together with the continuous development of new technologies, is rapidly allowing the aviation market to grow at unprecedented rates in its whole history. The high demand coming from passengers leads to a high demand of new aircrafts, capable of improving comfort and, most importantly, cut down the environmental impact of air travel. The innovative projects the two leading manufacturers, Boeing and Airbus, are working on are perfectly inserted in the mainframe of a shifting aviation model, from hub-and-spoke to point-to-point. The future airliners require next generation engines to achieve these ambitious goals, and General Electric is investing great resources in developing new machines that feature all the great technology achievements in recent aviation history and allow a strong decrease in both fuel burn and polluting emissions.