With this launch, we are introducing a new tab to Hangouts in Gmail that shows a list of a person’s contacts sorted by availability, making it easier to see which contacts are currently online.
Available contacts (those with the green circle) will show in an alpha-ordered list first, followed by a second alpha-ordered list of unavailable contacts. Contacts can be hidden or pinned to the top of the contacts list regardless of their availability.
To access the new contacts tab, click on the person icon on the bottom of the Hangouts section.
Rapid release, with Scheduled release coming in two weeks
For more information:
Reference by: www.google.com