Change to genre conventions.

In the last few decades conventions have changed for the genre of action films, and the trailers they use when advertising their motion pictures. From researching trailers from a few decades ago, compared contemporary trailers, we can see that there are significant differences, such as ... and that there has been a huge change to the genre of action especially in trailers. Recently trailers have focused more on the action involved with the 'action' themed films and their respective trailers, though historically there was quite a significant difference (such as seen in films like in the amount of action and build up the trailer created, and the tension it created for the audience itself. In modern day trailers we can see that there is use of special effects, the fact that they couldnt use effects in the older trailers means they had to show more plot rather than lots of action etc. For example in the James Bond film, From Russia with love (1963), the trailer reveals significant aspects of the plot, and alot of cuts of the scenes in the film, with considerable length, and quite a lack of action. But in the film Quantam of Solace (a more modern day James Bond released in 2008), we can see that there is a slow build up, which is something different from From Russia with love, as it is using less scenes and more suspense to build the tension for the audience.
Gradually the action builds up, creating certain effects for the audience, making them excited, making them want to watch the film because of the action and special effects used within the trailer, where as we can see in comparison to the older trailer is totally different and doesnt leave the audience in suspense etc, this has been realised over time and has created a change to genre conventions, i.e the special effects and suspense. Thus the example proves the point that the main difference between trailer conventions from decades ago, and modern day action trailers is the action and suspense.