Its not an "AI-killer-app" thats the real deal I think. Its that these AI tools (esp LLMs) are truly powerful tools in everyday work now. Automating stuff is a breeze now whereas it was much more involved before. Data classification, content/code creation, data transformation, ... typical jobs for software engineers boil down to this. Its only a prompt now you fire against an API. Automating tasks that used to require human clerks is now a few hours/days of creative coding and the tasks are gone.

A surprising amount of work can tolerate a percentage of errors in a non-deterministic way, even before considering that humans make even more errors that way usually. :-)