While I do agree that AI is going to bring a huge shake up to the search market, I still believe that Google is in the best position to fight this battle.
Realistically, given how fast the AI field improves month after month, do we think it will take long for Google to replicate a product similar to ChatGPT? I don't think so.
And then they are the company that's best suited to have this AI driven search in Android and Google search thus limiting the impact of this whole problem.
Sure, maybe Microsoft will deprive them of some developers that will look for information inside VS Code or their editor, and stuff like that, but overall I don't see Google going to suffer that much as long as they are able to answer the ChatGPT challenge in a meaningful time, something they should be easily able to do given their immense computational and data resources.