As I understand it, AI is only really getting traction in IT and software development. It's been mostly irrelevant elsewhere overall, all things considered. That could change, but basically there's only one product that is selling. Dunno whether there is $500b/year of IT and programming to replace.
People are using it to do contract negotiation without a lawyer, argue with their doctors over health matters, complain to teachers about their methods, etc. On the flip side, lawyers are using it in supplement to paralegals, doctors transcribing patient notes with it, and teachers are using it to generate worksheets. It's being used fairly widely already