Dona Sarkar today announced that Microsoft has moved Windows 10 build 17133 to the Release Preview Ring. This comes one week after the build was initially released to both the Fast and Slow Rings, and just one day after it rolled out to Windows Insiders with HoloLens headsets.
— Dona Sarkar (@donasarkar) April 5, 2018
Since the Release Preview Ring is the lowest and less risky ring in the Windows Insider program, this might mean that the release of the Redstone 4 Windows 10 update is coming near. It is widely believed that this build 17133 releasing today is the RTM, which would ship out to Microsoft OEMs for installing on new PCs.
Microsoft is now likely putting the final touches on the Redstone 4 update, and might officially announce both the naming and an official release date within the next few days. Anyway, you should be seeing this update now in Windows Update if you're a Release Preview Insider. Happy downloading, and let us know how the experience is going for you by dropping us a comment in the section below.