Then again, people might be more inclined to discuss those sorts of topics if there was a board dedicated to that. I've noticed a lot of people posting media related topics on other boards outside of off-topic; it might just remove those less-serious threads off the Regular's Forum for instance.
"Media" is a pretty broad term - it can encapsulate music, theatre, art, photography, TV, movies & film, technology, current events, news reporting & journalism, the internet and communications... just to name a few things, not neglecting their respective mediums through which that sort of information is channelled.
If anything, a Media Forum might actually organise the threads on here, removing them from non-specific, more personal boards.