Around July 2016, Windows 10 is slated for another major build and evaluation of preview version is shared below:

http://www.computerworld.com/article/3061153/microsoft-windows/first-look-the-new-windows-10-anniversary-update-preview.html

The first big update to Windows 10 will come this summer, a year after the operating system’s initial launch, with the release of what Microsoft is calling the Windows 10 Anniversary Update. The update’s exact release date hasn’t been set yet. Windows 10 was officially released on July 29, 2015 — but that doesn’t mean that the Anniversary Update will hit on the exact date.

When it is ready, the update will be delivered — as usual — via Windows Update. That means you won’t have to do anything manually — it will install automatically on its own. But you don’t have to wait until the official release date to install and use the update. Microsoft is releasing preview builds well before then — including one that you can install today.

As of this writing, the latest update is Windows 10 Insider Preview Build 14328. What follows includes information about features that Microsoft has announced will be in the final as well as features that are implemented in some way in the most recent build. Although the update is being called the Windows Anniversary Update, don’t expect many big presents. While there are some very solid and useful additions, this isn’t a big-bang change to the operating system.