Today Microsoft suspended downloads of the fast ring and the slow ring builds of Windows 10 Insider Builds. They also removed the ISO and are deactivating the activation license. This is all in buildup to the main event 16 days from now: Windows 10 RTM!
It was stated that there would be another build but that testers will use the same update channel that will be used to pump RTM out to a billion devices. All I have to say about this is get ready, get your computer backed up and ready, and welcome to the future!