The SEO world is gonna love AIGC. I'm sure it's already in wide usage there; it makes the convincing-but-fake review websites trivial to stand up in quantity.
It's the real content that's going to get disrupted/destroyed.
It's been in use since at least 2006 that I know of. That's when I was first let onto it by a friend running a big content farm. Now it's absolutely out of control. I use it myself generously to help me write articles, but you have to be incredibly careful because it so frequently hallucinates. You have to have some knowledge of the domain you are writing in to peep when it is going full HAL9000 on you.
Yes, I know a few SEO/SEMs. They're ecstatic at the moment with how much easier and cheaper AI has made it for them to pump out shitty content.
This is already underway and it's already the case that Google is sending you to a bunch of mediocre articles that were written mostly by an AI. The real question is what happens once that trend compounds over the next 2-3 years. It is working right now so it is going to 10x.
AIGC is absolutely already here. Recently I was trying to find information about a miter slot on a piece of equipment. One of the more helpful articles had a quick shout-out to miter slots in the middle of a listicle about casino slot machines.
It's the real content that's going to get disrupted/destroyed.