I used to be. Seems like a lifetime ago...I'm pretty sure he meant important as "a lot of people watched each week and talked about it afterwards" but you seem like a pretty big BS fan so I'll give you the benefit of the doubt.
And I think that's the crux of why it makes me crazy. I think you nailed precisely what he means by 'important,' and I can think of many words to describe a show, movie, song, or artist that people enjoy talking about. 'Important' isn't one of them. For a writer (at least once upon a time) and a person who sees himself as pop-culture savvy, that kind of laziness or inattention to the words he uses is unforgivable. I just can't get past it.