Yesterday Microsoft released Windows 10 Insider Preview Build 17643 to insiders on the Redstone 5 Skip Ahead ring. In this build Microsoft adds Sets+Office 365 integration and Microsoft Edge, Data Sense, and Magnifier improvements.
Even though Windows already has quite a few ways to create screenshots, Windows sleuths discovered a new feature called "Screen Clip" being developed in Windows 10 Redstone 5. Screen Clip allows a Windows 10 user to drag a selection of the screen and create a screenshot from it.
According to a sleuthing Windows Insiders, the name of the next Windows feature update appears to be named "Spring Creators Update". This is based on the output of a command entered in the latest Insider Preview build from the skip ahead ring.