Microsoft is experimenting with tabs in File Explorer and other apps on Windows 10

[Windows Central]

Microsoft is experimenting with bringing the browser tabbing experience to all apps in Windows 10, including File Explorer.
If you're one of many Windows Insiders who have been constantly asking Microsoft to bring tabs to File Explorer, we may have some good news for you. According to sources familiar with the matter, Microsoft is currently experimenting internally with a new feature called "Tabbed Shell", which brings the familiar browser tabbing module to all app windows in Windows 10, including the File Explorer.

Mock-up by Windows Central

Full story from the WindowsCentral blog...