You forget laserdiscs, smaller videocameras, DVDs, and online payment systems ...
It's also probably the only thing really using VR/AR right now to any significant degree.
It used to be that there was a porn convention at the same time as CES in Las Vegas. For a lot of years, the porn conference was the better of the two from a technology standpoint.
Don't forget the role in testing censorship laws. It is fantastic in a way. Always a wet finger in the air to see in which direction it is blowing, constantly asking "how can I make money from this?".
Videocasettes? Check.
Internet? Check.
Thank heaven for prurient smut, driver of all great technology. Without it we would still be in the stone age.