Windows Insider Build 15002 released to Fast Ring for PC:
Announcing Windows 10 Insider Preview Build 15002 for PC - Windows Experience BlogWindows Experience Blog
Many, many changes are in this build, listed under the "major subjects" listed below, along with "Other changes, improvements, and fixes for PC":
Microsoft Edge Updates
Start and Shell Improvements
More Cortana improvements
Accessibility Improvements
Windows Defender Improvements
Settings Improvements
Improving your precision touchpad experience
BSOD is now GSOD
Quick Virtual Machine Creation in Hyper-V
Improving your update experience
Windows Information Protection improvements for business customers
Power usage experiments on select Windows 10 devices
Input Method Editor (IME) Improvements
Windows Insider Program website updates