Yeah, if the NFL doesn't change things up quickly then I definitely agree with you that they're going to lose their throne. Surprised it's taken so long for something like this considering that over the past few years nothing innovating or game changing has taken place, and there's just been a lot of negative aspects to the league what with the brain damage problem and everything else.
I wouldn't be the least surprised to see the NBA take over. Though I'll just pray that maybe one day decades, or centuries from now we'll see the NHL take charge over everything else ;)