Robert Scoble makes an intriguing point here, linking to this page.
Has Sony gone mad? Prominent adult movie producer Digital Playground says it is forced to use HD DVD instead of Blu-ray, because Sony does not allow XXX-rated movies to be released on Blu-ray.
It does not matter how you stand to porn. It is here and it is a massive business. It is also an industry that is an early adopter for new media technology. VHS might not have won with out the adult film industry adopting it.
Robert further points out the parallels with the VHS vs. Betamax struggle.
When I worked at LZ Premiums in the 1980s, the Beta vs. VHS video tape formats were in full swing. Our store rented video tapes, including a fairly large selection of adult videos. Many many VHS sales were decided on because of the much greater availability of adult entertainment in the VHS format.
Intriguing stuff.