I don't know, you do bring up good examples but I feel like they are the exception to the rule, not the other way around. I think Horror has gotten more serious than it used to be. I think in the 90s it used to be kind of campy but now I feel like the movies are more serious than they used to be
Oh, I don't necessarily disagree. In a lot of ways you can consider these "exceptions" almost like a subgenre. I think that first and foremost, horror is classically designed to get a fright out of people. Sure, you can find some campy examples, but yeah..horror is supposed to get a rise out of you.
Stuff like Oculus and Dark Skies (blech) is absurd in and of itself, you know? After you get a fright from someone being sucked into the sky or getting their head cut in half as a result of an evil mirror, you might jostle in your seat a bit.. then when you think about it, it's all so silly.
Guess it depends on your point of view. Either way, there's plenty of different sorts of horror out there.