MTV, that pop culture juggernaut of the last three decades, is finally, blessedly, culturally irrelevant. “There was a time in the 1980s and ’90s when the channel had the ballast to send an act to the top of the Billboard charts, but ‘American Idol’ is the new boss. There was a time when the word ‘clip’ meant an MTV video with artistic and commercial punch, but now the word refers to the virals that ricochet through YouTube. And there was a time when a band had no future without MTV exposure, but now a MySpace page or a position on iTunes is more essential. When it comes to the buzz biz, MTV is out of the loop.”