If people use it to replace voice assistants or search engines, you can see how this new invention is not really adding anything you already hadn't.
AIs in general are very useful, but apart from the campaign they did to change everything's name into AI (also well known algorithms and "old" machine learning), if you look at all the possible applications, LLMs are possibly the least useful of them.
Especially if you take into account how much money they spent, and how much effort they put to shove it in your throat.
If a technology is convenient for people, you shouldn't need to insist to make people use it. If it is convenient, people will use it in a natural way.