This is just a passing fad. The reality is that when a question is asked about a place with which a forum member has familiarity, they either will usually respond automatically, or someone will say, "Maybe so-and-so knows the answer to this..."
I can see the possibility of doing an entertainment board in Off-topic, similar to sports, but other than that, not sure any other boards are warranted. We get threads about music, movies, TV shows, and books occasionally, so there might be a demand for that. But this "ask me anything" deal won't really have any staying power.