YouPorn to offer HTML5 video tag support
newteevee.com
newteevee.com
Maybe if someone creates a porn site that only uses HTML5, it can become the killer app needed to make people upgrade browsers.
If it weren't for Sony and later Warner Brothers respectively we would have had Betamax over VHS and HD-DVD over Blu-ray.
None of these are really in the "must get the latest in porn" category.
I think you're definitely on to something.