I shot this video to show what I mean. In it I walked from the very back of Hall 9, the least active, least packed hall among the four public halls used for convention. Where the other halls have booths from Microsoft, Sony, Nintendo, EA and Activision, this hall's main exhibitor was NCSoft. A good portion of the show was dedicated to pro PC gaming.
Keep all of that in mind when you watch the video: This is the small, lightly populated hall at Gamescom. It's also the quietest.