Windows 10 Build 10056 got leaked yesterday. This new build includes several new changes and new apps. Microsoft has tweaked the design of Cortana on the Taskbar. As you can see in the image above, Cortana is now in the same height as Taskbar. Microsoft has also included a new feature which allows users to find information about the song that is playing right now. This new feature is available in the Cortana Menu.
When you tap it, Cortana will listen to the music and find info about it.