Your comment screams a superiority complex, but I bet that you are actually a nice person in real-life. Hotz is doing good work, and everyone in the technical field is relying on work done decades before they were born.
You mean like this one, from Defcon in 2013?
http://hackaday.com/2013/07/26/defcon-presenters-preview-hac...
Or The Defcon 19 How To CanBus Hack Workshop, that taught classes about this in 2011?
http://www.canbushack.com/blog/index.php?title=learn-to-canb...
Unfortunately for him, defcon prefers original content, not someone claiming credit for what has been demonstrated repeatedly in previous years.
It's an impressive personal project, no doubt about that. It's however also important to recognize the difficulty of having a system that works in mass production and handles all kinds of situation. Like someone said earlier it's easy to have the car drive in clear day with very visible markers. The hard part is when it rains, when it's foggy, when things are less optimal, etc.
Once he get to that point he'll find that part to be a lot harder than what he's accomplished so far.