Cinema is an ever-changing medium. This is certainly true regarding its technical progress, which puts in front of our eyes a concrete change in the way a movie is experienced, whether this means hearing sound on the screen for the first time, or experiencing 3D viewing. Technical innovations behind the camera let the filmmakers exploit increasingly advanced softwares for editing, CGI, color correction, and so on.
The fact that technical progress is the most evident should not make anyone forget how important the progress around the narrative aspect of the movie is. Cinema always moves forward, but in order to do that it has to convincingly find new ways to tell its stories.
Sure, certain types of storytelling have always been profitable, but only the movies that push the envelope storytelling-wise are able to keep cinema fresh and engaging.