I had an interesting experience: I was taking out a loan for some solar panels and there were some complicated instructions across multiple emails. I asked Gemini to summarise exactly what I had to do. It looked through my emails and told me I had to go to the web site for local rebate scheme and apply there. It even emphasised that it was important that I do that. I scoffed at it because I thought my installer was going to do that and wrote it off. A few weeks later, guess what: the installer calls me because they can't see the rebate application in their portal and want me to go check that I applied for it (!). Sure enough, I missed the language in the email telling me to do that and had to do exactly what Gemini had said weeks ago.
I do think Google has a real shot here because they have such an integrated email and calendaring solution where everyone already assumes it's online, fully indexed etc.