Part 4: Customizable experiences.  
VR porn already exists in the simple smartphone in a cardboard box goggles set to things as complicated as VR Goggles or Head Up Display with tactile Gloves or a VR Websuit, which can electrically stimulate the body. With things like harnesses and rotating treadmills, where the treadmills are adjustable at angles, like any other treadmill but on a base that can pivot to allow users to turn in different directions will become more affordable in the future, allowing for more physical movement in a limited space. 
But things are improving. Eventually what I imagine will be a suit made of microrobotics which will have many uses. They could help the paralysed to walk, it could give you an electric jolt if you had a heart attack, or could defend your body from attack. It could also allow your body to move in one splot but actually feel resistance and thus things like squishiness, or textures making VR all the more immersive. You could have VR sex with a virtual character with the interior of the suit making their likeness or appearance. The suit could also be used off the person, as either a robot servant in whatever form it can configure, including the external appearance of a human being, and it being privately owned by you, could be used as a sexbot.
But how do we make it seem like a real person? Introducing the MRI video. Medical scans will use not only digital cameras but eventually video cameras, leading to video CAT scans, video Magnetic Resonance Images, video PET scans, able to record the entire human body as it experiences things, which lead to not only better knowledge and healing the human body, but to replicate it with such things as breathing, heartrate, muscle movements and body language. This will allow your AI suit/robot to become more and more human-like in appearance and behaviour, but be not sentient, and merely an AI program customizable to whatever desire you have. It will be also this body monitoring of yourself that this robot will be used to help you during difficult situations, helping give you a massage, help you calm down, help splint a leg or arm, shut down sensory overload or anticipate nightmares and other emotional behaviour. It will be a suit in which you can alter your appearance visually, on the external sense, or through a BCI be there to be an avatar doing duties for you or helping you interact in the world if you're bedridden or in a coma. This could also reshape itself into things like bean bags, couches, beds, bags, tents, or chairs, desk or table. It could even become a television or interactive computer screen. It will be the ultimate swiss army tool.             

Part 3: Customizable actors,
It will inevitably become possible to superimpose an actor's likeness onto a computer generated and thus manipulable body. This will allow for new combinations of actors who may not have worked together before. With this computer generated world, customization goes even further. These will be accessible and photo-realistic, outdoing any previous computer generated images. These could be accessible on tablets, smartphones and pcs, but also viewable in Augmented Reality and Virtual Reality. This will be either using a pair of goggles with earbuds running wirelessly to a smartphone for AR or using Googles and Gloves to entire Websuits for VR, allowing electrical stimulus of the body.      

Part 2: Customizable porn sex positions: Porn videoCYOAgames The next new development would be the same 360 degree cameras now fitted to drones, with more pixel storage to allow zooming in and out of the video. The use of digital cameras will allow a third to first person perspective of a porn actor, who essentially now plays a role like that of an avatar in a RPG game. You know how YouTube movies end with previews of other videos the user can click on to view next? Well imagine a series of short 360 degrees videos linked to each other in said fashion. Only instead of videos not related to the video being shown, it shows instead options that user can click on to affect the actor. Basically you could get the actor to film scenes of different takes of various karma sutra positions that both actors can do, and thus allow those different positions as options for the user to choose. By having a variety of positions to choose from, the viewer would have an option to customize what positions the actor does in their viewing experiences. The 360 degree videos will also allow angle customization, like the first part, but in this part the viewer can affect what positions the actors use in sex. This will attract niche markets, while the 360 degree cameras will allow both men and women to view the actors performing said act as they wish. 

Part One: Customizable angles: 360 degree video cameras, robotic arms, 3D printers, and aerial drones, and user customizable videos   One technology developed is a 360 degree video , with such films playable and alterable by the user using a cursor on Facebook. Now this I think could have benefits for use in the filming world. A 360 degree video could enhance films of POV view or in general, by allowing not only the POV of usually the male loving the female but this 360 degree video could allow for once the POV of the girl being loved, or views from the bottom lover as well as the top lover if the appears near eyelevel between the 2 leads. This will allow more customizable videos the user can alter to allow shots from top lover perspective, bottom lover persepective, but also make godseyeview or third person persepectives as well as first person perspectives. Such a 360 degree video could be connected to a robotic arm that could be held up by brackets on the ceiling, if its heavy equipment, and which I assume the robot arm would be wirelessly charged from a power source, like smartphones are today, and thus not have to use batteries or cables, and would also be eventually wirelessly controlled from a phone app. Another technology could be an aerial drone, which will allow greater shot variability than a fixed arm, or one fitted on a movable chassis that moves forward and back as well as left to right like a current day 3D printer extrusion nozzle chassis. This will allow not only views by the dominant lover, but also the submissive lover, or switching from one to the other at the click of a mouse cursor. This will allow entire other niches and audiences to interact with the actual video angle to suit it more to their liking.  

Dear Porn film makers, 
As a sci-fi author I have a number of ideas for future porn films, allowing greater and greater amounts of user-customization and interactivity between the actors and viewers. These will be in a series of parts, each describing the technological development as things progress. 
Feel free to use these ideas, as long as you credit me in the acknowledgements. 
Peace out 
Geekyscreenwriter.