The latest preview build released by Microsoft for Windows 10 which can be installed by the Windows Insiders has some new features. This would most probably be part of the Redstone 4 Major update target to be released this Spring 2018.
One of the notable enhancement is the Task View feature. Starting for the change of the icon on the task bar.
Once the new Task View icon is clicked, the user interface has changed.
The creation of new desktop (virtual desktop) has been placed at the top left hand corner and a new scroll bar is been incorporated to view the active applications.