Google had numerous communication applications. Hangouts would unify messaging and aim to create a compelling communication experience by bringing converstaionts to life.
Let's show what we can do emotionally for a product and for people.
Instead of treating NEW messages in a different visual style, we can animate messages in to make the experience feel less asynchronous.
By emphasizing and using a more expressive send animation, messages possess a more confident characteristic, giving users less worry if a message has been delivered.
Confidence can be increased with context awareness. If we increase visibility, conversations can cut the crap and get right into the real conversation.
We can reduce noise in the app by grouping objects. Having a visual language for groups will make the UI less overwhelming.