I didn't know this!
The Blender team is working on Blender 2.8 which will bring a lot of new features, including a lot of UI changes.
There was an article about some of these changes a while ago on their blog [1], and more recently a video showing a lot of these UI changes... available on the Blender Developers Youtube channel (how ironic!) [2].
[1] https://code.blender.org/2018/04/tools-toolbar-and-tool-widg...