You want to say porn is what allowed Blu-ray to beat out HD-DVD?
I doubt it. By the time that format war arrived the internet was well and truly established, so I reckon the vast majority of NSFW content was consumed with no physical media.
Another reason would have been Xbox Vs PlayStation. The Xbox 360 had an HD-DVD as an optional extra, compared to the PS3 including Blu-ray as standard. Which was going to win?
The porn industry’s influence is vastly overrated.