Microsoft have released an update to the current Fall Creators Update build 16299. The update take the build to 16299.15 as Microsoft are testing build servicing cumulative updates via Windows Update. This build is the current fast and slow ring release.
UPDATE 10/2: We have released Windows 10 Insider Preview Build 16299.15 to Windows Insiders in the Fast ring. As we prepare to release the Windows 10 Fall Creators Update to the world on October 17th, we will now start testing out servicing this build with the Cumulative Updates via Windows Update
Here is my hands on video of 16299 from last week.