Originally Posted by the last son
The general public has forgotten about it. Outside of Batman fans people don't really talk about this movie.
That's true of most Batman movies. Doesn't mean they're "forgotten" forever. TDK was something of a phenomenon with its massive pop culture influence, similarly to Batman 89.
Talking has died down because the story is over and the general public has understandably moved on. Right now there's no new movie to look forward to. If the rumors about Nolan/Bale returning for WF/JL end up being true, it'll come right back into the mainstream consciousness.
Personally I think I'm fine with Bats taking a bit of a breather from the limelight. It's Supes' time to shine now.