Microsoft has announced it will add five new features – some experimental - to the TCP stack it will ship in Windows Server 2016 and the Anniversary Update to Windows 10.
Am I misinterpreting the anniversary update? Is that not a live branch thing? If it's just a way of saying "It'll be rolled out over time to machines after the anniversary update has been deployed" then you're probably correct. I assumed it to mean it was part of that update landing in August but not yet being tested beyond Redmond's walls.