They showed the prototype S. They showed the prototype X. They showed the P85D. They showed the PowerWall. With the biggest event they've ever had, they're not going to show the 3?
His reply is more of a snark at those that speculated that they won't show it.
I'm glad a lot of people heard something different from what I heard. Elon doesn't seem to like playing games in general, which is why I would have expected him to answer simply "Yes we'll show the car" if he was sure they would.