Movies aren't scary anymore. The stopped years and years ago.
The last unnerving movie I saw was the Exorcist. I grew up in the midst of the Nightmare on Elm Street/Friday the 13th/Hellraiser franchises, movies that were "Terrifying" people, which is a joke in and of itself. Horror movies don't even frighten you. The see how much disgusting crap they can pack into them, playing of a person's queasy stomach for blood/vomit/heads exploding, and couple it with not scaring ... but startling. OMG that dude melted out of the wall with *insert generic blunt weapon type* and where did all this shrill staccato music come from
In order for horror to make a true return, they have to stop listening to the frat boys and making films like Hostel and Club Dredd, and return to a simpler time, when we created the fear for ourselves OR the fear was something so plausible it could be real. A horror movie cannot be made alone on corn syrup + red food coloring and wads of various materials made up to look like organs.
EDIT: Wow ... sorry for the rant. This, I'm guessing, was a sore note. I miss true horror films.