Modern AI (LLMs etc) is definitely a revolution. Anyone that has tried ChatGPT can tell that, just like the only people saying the iPhone was a fad were the ones that hadn't used it.
The thing that is hyped around AI is companies just trying to shove it into everything, and say stuff uses AI when it is totally inappropriate. That doesn't mean AI itself is nonsense though. The same thing happened with the iPhone (everything had an app even if it made no sense).