Marc Andreessen: Flying cars are closer than you think (theverge.com)

Look into zee aero, Google's super duper secret flying car concept. From what I could gather they're building a hybrid, using wankel engines to provide power and maybe some batteries or supercaps for the massive power boost needed on VTOL takeoff and landing.

Cool stuff

Here is the thing - For something to fail you need just one factor to fail, for something to work you need all the factors to work together.