Children of men - Opening scene

Today i watched the opening of three modern thriller films. I did this to see what type of film is successful and what is needed to create suspense and make the audience want to watch on.
Children of men sets the scene in a busy cafe with lots of people crowding round a TV listening to the news. The headline is that the youngest child in the world has been murdered at age 18. This gives the audience the idea that the world has stopped reproducing. We are shown the story through a mans point of view which gives us the impression that he will be the main character/hero. He then ventures outside the cafe and we are shown that he is in london in 2027, this film is set in the future. A bomb then explodes beside him many people are injured. The bomb exploding shocks the audience but also leads us to ask questions such as; who set the bomb?Why did they do it?