Sticking AI right into search seems like a bad idea for search engines to do. Imagine all the extra compute resources that is taking and most people who are doing a search are probably not interested in the AI answer and just skip over it. What they should do is make it an option when you search. Ex: do a regular search or do an AI query.
I have noticed though that the "AI summary" that Google now gives - for _some_ searches, but not all (and I don't know why it does it sometimes but not others - maybe it's how you word the search?) - seems to be pretty unreliable, to the point where I scroll past it. When searching for information on topics I've already read a lot about, that AI summary seems to be rather inaccurate, and I personally wouldn't trust it.