He single-handedly - along with the finest palates in France - brought California wine to the world's consciousness, thereby giving credibility to New World wines overall. Let's just say that it wasn't a happy moment for the finest palates in France.
It's not unusual to do an overnight road trip to a "Wine Country" and back over the course of a weekend. Yes, it's so close that even a tourist to Las Vegas could take a couple of days to visit Wine Country. How great is that?