I think it'd be very useful to have the ability to tag chats or have separate project folders. I know the current goal is unified intelligence, but I think it could also be applied to having the ability to make sandboxed chats that have information that wouldn't be relevant to daily life for example.
They could be referenced by specific tags, and there could also be folders that have in-folder context and can also be referenced in a conversation through using a tag. It'd make for more organized chats with similar content that isn't general information and isn't automatically referenced, that'd run parallel to the current personal intelligence model for general information.
Basically, a way to make gemini not muddle the conversation with information the user might not want referenced in it, but also have an easy way to reference it if needed.