Microsoft has begin testing the Windows 10 version 1909. At present the distribution is throttled to about 10% of insiders on the release preview group. This is not the final version; they will be able to choose to download and install this update on their PC. After the update finishes, they will be on Windows 10 build 18363.327.

More testing will be done once the rest of the new features are added to 1909. The goal now is to gather more telemetry to see how well the new components are working. I noticed it when testing a recent flakey video driver.

Microsoft has worked on using AI to detect bugs. Rare bugs can be discovered certain problems not widely detectable generally. The debug process is now so complicated that vast swarms of servers are needed to handle vast tables of error messages and possible remedies.

While version 1909 is going to be delivered as a service pack but there will be new ISO images available for those who need to update a recovery USB stick. The use of a service pack had been done much in the past and this approach has been well received by the community.

In this new version, Windows 10 introduces the ability to create calendar events from the taskbar without the need to open the Calendar app. The Start menu left pane will expand automatically to reveal the name of each option.

Notifications are being revamped so it easier to handle notifications etc. from within apps on the taskbar. Also revamped in the settings.

The CPU scheduler now using a new rotation that more fairly spreads tasks around.

Windows 10 version 1909 also improves general battery life and power efficiency improvements for devices with certain processors.

For bitlocker some improvements in security for corporate needs. Now with in-tune/MDM etc keys are more secure. This feature will help prevent accidental recovery password disclosure as part of manual bitlocker drive unlock by users.

Inherited Activation is a new feature available in Windows 10, version 1803 that allows Windows 10 virtual machines to inherit activation state from their Windows 10 host. When a user with Windows 10 E3/E5 or A3/A5 license assigned creates a new Windows 10 virtual machine (VM) using a Windows 10 local host, the VM inherits the activation state from a host machine independent of whether user signs on with a local account or using an Azure Active Directory (AAD) account on a VM. To support Inherited Activation, both the host computer and the VM must be running Windows 10, version 1803 or later.

Many will appreciate the more modest download sizes as the 4GB ISO images are released twice yearly. Moving to smaller update rollups with periodic service packs is more practical.