At COP21 are, reports Chas Danner in New York Magazine, "more than 100 heads of state and 40,000 attendees from more than 190 countries." The goal is to hammer out international agreements which will slow down climate change.
If that succeeds, it might be able to accomplish more in two weeks than the WEF has in decades.
In addition, being in Paris right now gives those at COP21 unique insight into the impact of terrorism on a sophisticated society. They can crank out articles, white papers, books, and documentaries.