Google says it’s combining “Bard’s generative and reasoning capabilities with Assistant’s personalized help.” This includes Bard Extensions that can access your Gmail, Google Drive, and Docs to answer questions.
Google calls Assistant with Bard an “early experiment.” It will soon roll out to early testers for feedback before seeing public availability, on Android and iOS
This new Assistant can also “help take actions for you.”
For example, say you just took a photo of your cute puppy you’d like to post to social media. Simply float the Assistant with Bard overlay on top of your photo and ask it to write a social post for you. Assistant with Bard will use the image as a visual cue, understand the context and help with what you need.
From a UI perspective, Assistant with Bard’s “conversational overlay” floats above your screen and accepts text, voice, or image input. It is no longer a sheet, as preserving background context is an important consideration.
--- 9to5google