SharePoint Communication sites are now rolling out to Office 365 First Release customers, followed by full worldwide rollout to Office 365 customers in the coming months.
https://blogs.office.com/en-us/2017/06/27/sharepoint-communication-sites-begin-rollout-to-office-365-customers/
Nice tip to enforce new communcation sites in your tennant
Want to Get a Look at the New Communication Sites? Here’s a Trick!