I went in hoping to get something out of it though not expecting much. It started out very interestingly with the burial of a time capsule in 1959. 50 years later, it is opened and Nic Cage's son is given a piece of paper that only has numbers on it. He shows it to his father who, as a scientist, sees a pattern, a pattern which strongly suggests precognition (in the movie, Cage is an atheist).
The movie did quite well in generating tension over the first 75 minutes. After that, there is a great deal of overacting (most notably by a female companion of Cage's). After a solid beginning, the film was starting to fall apart. Then it did something that I wasn't even remotely expecting (especially not from a mainstream film).
SPOILER ALERT: Severe Tire Damage
Are you sure you want to KNOW? In the latter half of the movie, it toyed a bit with the idea of the world ending, but since the film starred Cage, there was no way that was gonna happen, right? He would end up saving the day. That turned out not to be the case. As the poster somewhat alludes to, the Earth does, indeed, meet its demise.
Cage and everyone else on the planet perishes. Now that is ballsy and for that (and a couple other things that I don't want to reveal), I recommend the film. Though I wouldn't give it 4 stars (as Ebert did), it left quite an impression on me.