porn buyers are so well trained on how, when, why, and for how much, that I see little change anytime soon. Any so-called new age of porn is always a trend and right back to the basic system. I don't see the pricepoint changing, I don't see the importance of super-affiliates changing , and I don't see the affiliate model changing unless a dynamic new media enters the world. As long as porn sites are delivered over the web in the form of vids and pics, I can't see it changing much. This media has evolved to it's point and is just waiting for the next medium to come along, the way the internet replaced video/dvd rental.
For example, if Direct to brainwave VR or some new holographic porn comes about requiring a certain location based transmitter, then adult shops will be the distribution method and the net will become secondary...until then I don't see much changing.
I will say that as phones get bigger screens and become the main way people surf for information, the mobile web networks may gain more ground and people may browse through their personal devices stumbling upon porn for purchase and then bluetooth to a large screen or something...but the system is still very similar and the affiliate model would still probably hold true.
I do also see the connection between web and DVR becoming more relevant, the ability to move that content to a bigger screen to watch may be appealing but again, the affiliate systems seems to cover it as far as the marketing methods.
Just some food for thought.