Google is rolling out a new inbox type that groups your mail into categories which appear as different tabs. Categories include messages from friends, social notifications, deals and offers, confirmations and receipts, and more. This new Inbox type replaces the Smart Labels lab, which has now graduated as part of the rollout. The new Inbox is optional and you can always change to your preferred Inbox type. The new Inbox will gradually roll out to all M+Google accounts starting June 11. For more information and a demonstration of the new Inbox, see the official post on the Gmail blog.
Yes. Google Apps customers have the option to opt-in to the new Gmail inbox, and can also opt back out.
Will this feature be turned on automatically for Google Apps users?
No. Google Apps users must manually enable this inbox from the gear menu.
Will Google Apps users eventually be switched over to the new inbox permanently?
No. Google Apps customers will continue to be able to use other inbox layouts.
How does a user turn on the new inbox?
From the gear menu go to Settings and select Configure inbox (Note: This will appear once the feature has rolled out).
Are there Admin console settings to control this feature?
No. This new inbox is treated like all the other inbox layouts and users can freely opt in and out.