Right now, OpenAI mostly has a big cost advantage; fully exploiting that requires lower pricing and high volume.
While google did do a good job milking knowledge and improving from its queries and interaction data, openai surely knows how to get information from high quality textual data even better.
Openai made an interface where you can just speak your natural language, it didn't make you learn it's own pool of keyword jargon bastardized quasi command language. It's way more natural.