I don't think AI is actually that good at summarizing. It doesn't understand the text and is prone to hallucinate. I wouldn't trust an AI summary for anything important.
Also search just seems like overkill. If I type in "population of london", i just want to be taken to a reputable site like wikipedia. I don't want a guessing machine to tell me.
Other use cases maybe. But there are so many poor uses of AI, it's hard to take any of it seriously.