Looking forward to self driving autonomous vehicle in the near future ?
Why wait ? You can now remotely hack someone's modern car via your 3G/4G cellnet into the vehicle's CANBUS network.
Question is what are you going to do with it when empowered with that remote control.
http://www.forbes.com/sites/andygreenberg/2013/07/24/hackers-reveal-nasty-new-car-attacks-with-me-behind-the-wheel-video/