I think live sports are the only thing that could be actually run on broadcast networks. Since TV series, news, and movies are most easily consumed on demand (i.e. I watch what I want when I want), but live sports are pretty much one off events that occur at a fixed time. Hence making it harder to timeshift.

Now that Google/YouTube is getting into the broadcast business, specifically broadcasting live sport, I have to say that traditional broadcasters are going to be facing an even faster slide into the abyss.