This is super cool. No longer need to fiddle with third-party LLM APIs.
For those worried that your emails contents might get leaked, I'm pretty sure they're not using your email content to train, but only use it as context. LLMs are stateless, as soon you you start a new chat, it forgets everything from before.
That's a different thing and they will have to ask for consent separately. I'm specifically talking about the feature of allowing Bard to access your emails/schedules/etc.