In short: NVIDIA has made a neural network which steers a car based on a single camera and trained only with footage from cars being driven manually. No control theory, no rules of the roads, not even the concept of a road is encoded manually.

Video here: https://drive.google.com/open?id=0B9raQzOpizn1TkRIa241ZnBEcj...

This is pretty cool. Granted, it does not handle extremely complex traffic situations (yet), but is it a much simpler approach to what most other groups are doing.