A week ago, Microsoft released Windows 10 Insider Preview build 17074 to the Fast ring with quite a few new features. Since then, the company has been releasing fixes for current versions of the OS that fix an issue that was causing PCs with AMD processors to become unbootable.
Now, that fix is coming to Windows Insiders in the Fast ring, in the form of build 17074.1002. When 17074 was first released, there was a block on AMD machines installing it for this very reason, so if you've got an AMD chip, you're finally free to install the latest build from the Fast ring.
There was also an issue that caused some devices to hang on the boot screen after the PC was upgraded, if the BIOS has virtualization enabled. This too has been fixed in today's cumulative update.
Those that were looking forward to a full build this week are surely disappointed, although it's still possible that we might receive one this week. Perhaps it's more curious as to why there haven't been any new builds in the Slow ring in over two and a half months, as that ring is supposed to get updated monthly.