I was the DefCon demo and saw the video. I was certainly interested to see what they had done but I was NOT at all impressed by the researchers themselves, nor were any of the experts I know in the field of computer security.

What is being left out of this discussion is the VERY firm statement they made over and over that they were demoing this on a MacBook but that it was not limited to Mac drivers. Windows and some Unix were also just as vulnerable. Which makes sense since the 3rd party companies each write their own drivers for the various cards they provide to the manufacturers.