I was told, though I couldn't find confirmation, that Twitch would be permitting footage of Gen Con events from Second Life, even though the virtual world is on it's list of "prohibited games."
On Saturday night, there was a celebration party. A number of the convention-goers met up at a replica of Indianapolis' Union Station (Gen Con was originally going to be at Indianapolis). The crowd was a mix of longtime residents, such as Ceri Quixote, and newcomers.
the builds will be around for people to enjoy for a little longer. Tuesday August 4 will be the last day. Some places may require joining one of the con groups to get to. It's unknown whether future conventions will have an online portion for those not able to get to the real-life setting. Though if the mood of this one is any guide, it probably will.