I don't agree with this at all, but there are some interesting things to think about within the text.
I think his point is this: The experiments with form that have been going on since the beginning of poetry (or at least since George Herbert wrote "Easter Wings" in 1633) continue in new mostly unread or unreadable ways. Sadly, I have an opinion and it is this: There's more poetry worth thinking about in the hubskiverse than in the items referred to in the New Yorker column. I confess, I looked up Josef Kaplan's Kill List for you all. What d'ya think?