Sharing-economy superstar Uber is proposing once again to revolutionize the way we conceive everyday travel; this time, the company has released a 99-page document envisioning a new network of flying electric vehicles that will slash transit times in congested cities around the world. Driving - and Flying - Innovation Uber is perhaps best-known for its app that has changed the American taxi business. Just download the app and select a route and driver, and a "ride-sharing" Uber driver,