According to the Hollywood Reporter:
On the last day of the show, a panel of professional geeks — authors, TV writers, designers, etc. — gather in a small ballroom to debate the merits of one pop-culture spaceship over another. … [This year] They were deadlocked between the original Enterprise from the Star Trek TV show and the refitted Enterprise for first cycle of Star Trek movies.[…] Unable to declare a winner, moderator Mark A. Altman turned to the audience for help. And the person who pushed it over the edge was Neil DeGrasse Tyson — renowned astrophysicist, author and true geek — who decided to close out his first trip to SDCC with this panel. But he was just sitting in the audience watching. As true geeks do. And he was so moved that he delivered this impassioned, off-the-cuff speech.