Part of me hates the privacy implications of this, despite Google's promises. AI intimately integrating with your personal data seems the way of the future. I have to admit the FOMO is real here! Especially as I use Google Docs a lot, it's one of my main tools for work.
EDIT/UPDATE I've just had a look at the TOS for this, and its a big no from me. It wants to use your conversations with Bard as part of future training data. Needless to say those conversations include the results its pulled from interrogating your email and documents. Yikes! No thanks.