Windows Central is reporting that a new feature called ‘Tabbed Shell’ may be coming to Windows in a future update. From the Windows Central article:
Per our sources, Tabbed Shell is a feature being worked on at an OS level, and doesn’t require work from app developers to take advantage of it. By default, Tabbed Shell works with any app window, whether it be Photoshop, File Explorer, or Microsoft Word. Any UWP, Win32 or Centennial app will work. Much like in Edge, you’ll find a tabbed interface at the top of a window where you can switch between instances of the same app.
Basically, this would allow you to group multiple instances of a program into a single tabbed window or separate those tabs out into their own instance. As for when we may see this, Ars Technica is reporting from Windows Central
Windows Central’s sources are uncertain on when Tabbed Shell will materialize. It is claimed to be considered for both the Redstone 3 and Redstone 4 timeframes. Redstone 3 is due in about six months, with Redstone 4 coming a further six months on.
Personally, I will be really glad to see something like this for at least the Office productivity suite and Windows Explorer. Will hopefully make it a lot easier for manipulating data between different instances of Word, Excel and Explorer for me at least and should still have the ability to just drag out an instance into a separate screen to do a side by side comparison.