Ah see, I disagree with you Solo. But I mean, it's not that I think you're wrong, but for me and my group of friends, going to see TDK and the whole experience of it all was one of the most fun days I've ever had, and I ended up really fucking loving the movie. I'll remember it my entire life, and I'm still of the opinion it's the best comic book flick ever made to this point. But I guess I understand your point.
And I still talk about the Lord of the Rings. :'(
Actually what I think you need to consider is that the movies you're referencing about being "talked about" came from an entirely different generation of filmmakers and audiences. It's the baby boomers nostalgia-fapping, mostly. When we get to that age, I'm sure we'll all have that same quality, while when Miley Cyrus gives us an Oscar winning performance as a cumdodger, we'll all be "no one will speak of this next year."