For me though it wasn't so much the overall impact in the long run or anything, but the degree of relief from having someone finally addressing some of the issues he brought up. There's been a lot of frustrating decisions that WWE have made in the way some stars are treated or used or even released. Just having that brought up on TV (rather than being discussed amongst the internet community or it pretty much being unacknowledged to that point) made it worth it to me at the time.
Despite certain people apparently having a problem with Punk, I don't have a problem with anything he said about himself. They'd dropped the ball with him time and time again. The worst part is that unlike certain current guys that are also treated in such a crappy way, Punk consistently showed he had what it took and it was completely ridiculous how they'd pretty much just shoot themselves in foot by being stubborn against him for whatever petty backstage reasons there were, often undoing the momentum he had (as heavyweight champion, straight edge society, even new nexus [as in his efforts in that]). As bad as it is for certain other stars, I felt it was a massive waste of Punk's talents. He may have an attitude, but he HAS backed it up IMO.
Even though ultimately it didnt too much in the grand scheme of things, and as much as I actually dislike what became of him after (first with the Triple H, Nash aspect, followed by "digging crazy chicks" and pretty much a lot of what happened as more or less a Face), the fact is with what he said and even leading up to his MitB PPV match against Cena (I think it was that PPV?), those were interesting times IMO (far more interesting and worthwhile than most of the other content before and what more or less followed later). As far as i'm concerned, WWE became even remotely exciting with something "different" than what we came to expect in recent years. That makes it a very worthy moment IMO.