With the development of Blue Ray, we have brought about a much higher grade of filmography. Blueray contains a lot more data on a disc and as such is able to store more footage as well as contain it in a much higher format and display it in a higher screen dimention. These kinds of hardware improvements have really shaped society as we know it, as they have become the norm; it is very rare for a film to not come out on blueray, due to the overwhelming amount of people who refuse to buy any film that does not come on such disc.
Audiences have become more expectent, while at one point it would have been fine for a film to release on a disc that simply contained a play button, it is now expected for that disc to come with all the behind the scenes footage amongst many other things in high quality blue ray on a blue ray disc. Back in 2005 or so, DVD's such as Harry Potter contained minigames locked onto the disc that could be played using the TV remote; nowadays, these 'minigames' are either non existent, or exclusive to the later and more expensive versions of the same film.
Content is usually more detailed, in the sense that films are expected to be longe, originally during the peak of filmography, institutions feared that audiences would lose interest in a film if it was too long, and capped the film length to an unsigned 30 minutes; in modern culture, it is very common for a film to last 2 hours, and even more common for the same film to have an extra hour of bonus footage locked onto the DVD; the entire process is just to make sure the film a producer has made is not forgotten about and can be brought back several times to bring more profit.