Of course some people will lose jobs just like what happened to several industries when search became ubiquitous. (newspapers, phone books, encyclopedias, travel agents)
But IMHO this isn't the existential crisis people think it is.
It's just a tool. Smart, clever people can do lots of cool stuff with tools.
But you still have to use it,
Search has just become Chat.
You used to have to search, now you chat and it does the searching, and more!