The concert was right across the street from the GDC -- the Game Developers Conference. I had been reading the news out of the GDC all week, but I had no idea that the concert was happening in the same place. So the audience was filled with a who's-who of players in the video game industry. After many of the pieces, the conductor introduced the composer who happened to be in the audience with us.
Here's a very thorough review of the show that breaks it down in more detail than I could.