There was a whole topic about this on that "other" porn board not too long ago. One thing I saw there that made me think was that with all the proliferation of digital video clips available (thanks to web-distribution), some enterprising company will soon open up a "make your own VOD/DVD" service where you can mix and match whatever clips you want to create your own compilation. Beats the crap outta buying someone else's idea of what makes for good comps.

I also think you will see more of the "virtual girl" kind of thing, but with much better video clips. Basically film a porn starlet in any number of poses in front of a green screen, complete with a green dildo for insertion into her various orifices, all filmed in POV style. Then you can mix and match whatever stand-ins you want for the green-screen dildo's, mix and match settings, music, etc.....create your own porn scene as it were.

POV+Virtual Reality+massive library of digital images = custom porn on demand.

It's almost here now.