After a week without any updates:
6 April 2016
New SharePoint Document Library Experiences
Microsoft are changing the experience for SharePoint Online document libraries. You’ll begin seeing this new feature starting April 6.
In the new document library, documents can be displayed using classic or thumbnail views for a graphic look and feel. Libraries now support uploading folders and links in addition to single files. Documents can be grouped with views directly from the library home screen, and selected documents can be pinned to a highlighted section at the top of the library. A new document information panel displays in concert with the document library, and allows easy access to previews, activity history, sharing, and metadata editing. Document management functions are moved to a clean, responsive menu pane and the Ribbon is removed from the UI.
For more information: https://support.office.com/en-gb/article/What-is-a-document-library-3b5976dd-65cf-4c9e-bf5a-713c10ca2872?ui=en-US&rs=en-GB&ad=GB