Google themselves are an AI company (in case anyone forgot) - if LLM-powered search is going to become a popular product, then that's great news for Google. They already have an LLM capable of searching the Web, and they've already integrated it heavily into their search engine, browser, mobile phones, and Office suite.

OpenAI has nothing resembling this ecosystem, and will never be nearly as valuable a place to buy ads. Replacing Google is probably the least realistic business plan for OpenAI - if that's what they're betting on, they're cooked.