Ahead of a general release sometime next week, Microsoft has delivered the Windows 10 Fall Update to Insiders today, allowing them to test the new build and report any bugs before it hits the public.
There are a handful of changes seen throughout the Fall Update that improve the Windows 10 experience. Skype integration is now available through two apps: Messaging, and Skype Video, which allows you to send messages and video call other Skype users without having to download the full Skype application.
Visually, Windows 10 has been updated to include new context menus to make the experience consistent in and out of Universal Apps, while colored title bars are now used for desktop apps. Bug fixes are also a big feature of the update (build 10586), addressing everything from app download reliability to remembering your previous login type.
While Microsoft isn't explicitly saying that the Insider Preview build 10586 is the Fall Update, there is no mention within the operating system that this is a Preview build, and there is no watermark: signs that point to it being a finalized build ready for the public. This fits with some rumors indicating build 10586 had been internally signed off as the Fall Update.
If you want to try out the Fall Update today, you'll need be part of Microsoft's Insider Preview program and using the Fast ring. The update should be available to the general public next week.