The world has long dreamed of a day when flying cars become part of daily life. And despite many attempts, that day hasn't arrived. But we might not have to wait much longer. Advances in battery and electric propulsion technology have enabled entirely new types of aircraft to take to the skies. Startups Joby, Archer, Vertical, Lilium and more are developing eVTOLs, electric vertical takeoff and landing aircraft, with the vision of making air taxis a reality.

CNBC got an inside look at Joby Aviation, one of the eVTOL players with grand ambitions of not only building the aircraft but also operating an Uber-like air taxi business.

"This new mode of transportation allows us to move into the third dimension and rethink the way our cities operate," said founder and CEO, JoeBen Bevirt.