I just saw the Dark Knight and I have a question...

Ok. Great movie. Heath Ledger, awesome. But I still knew what was going to happen. I knew from the moment Dent flipped the coin in court that it would have two heads, and that he would become Two-Face. I also knew Gordon was not dead. Now I did take a bit of film theory in college, but I can’t help but think that movies, even the good ones, just are not what they used to be. I cannot remember a movie surprising me since The Sixth Sense.
Is this just me or has Hollywood film quality seriously declined in the last 10–15 years?