During WinHEC 2016 (Windows Hardware Engineering Conference), Microsoft made the announcement that they are working together with Qualcomm to bring Windows 10 to Snapdragon ARM mobile processors. It looks like Microsoft has already started uploading ARM64 builds of Windows 10 to Windows Update.
If you're following Microsoft news, there's a chance you've already heard about Microsoft and Qualcomm partnering on bringing the full Windows 10 experience to ARM64 CPU-powered devices. This Windows edition will support running all UWP apps but will also introduce support for running x86 applications on devices with ARM processors. We haven't heard much about it since the first introduction back in December 2016, but Qualcomm officials have finally announced the date of arrival for the first bunch of devices with Windows on ARM64.