Back at Google I/O 2014, the Tech Giant unveiled Android L with its new Material Design language. Material Design is a new, simple but attractive interface from Google. Android L comes with this new design. You can get Android L Preview on your Nexus devices right now. At the event, Google also announced to bring Material Design to its other services too!
So finally, the design has reached to some web services of Google Drive. This includes Google Docs, Google Sheets and Google Slides. Have a look on some of the images of this new design of these pages,
Looks beautiful! The design is being incorporated for all users. If you have not received this new interface yet, you will hopefully be getting it in a day or two. Stay tuned!