Agree with the other comments that it's not fundamentally innovative and no one with a sense of privacy wants to ship all browsing data to one of the mega-AIs.
BUT -- that's missing the strategic point here:
- Everyone realizes that being the gatekeeper for user interaction is key: that's where all the context is and utility will come from
- AI is providing a unique opportunity to overturn a long-held monopoly (Chrome's dominance) by providing
Put another way, ChatGPT + Chromium = OpenAI's Trojan horse.
It would be foolish for them to waste resources innovating on the browser engine (which isn't their core competency) when they can use their actual competency (AI) to take their bet at capturing the market