Immersive Explorer is designed to be an alternative to the default file explorer included in Windows (known as Windows Explorer).
It aims to provide an "immersive" experience to the user by focusing on the content rather than hiding it behind useless icons and large window chrome and borders. It will also avoid the user from having to open different applications and navigate between multiple windows when doing things as simple as viewing a picture.
For example, when the user want to see a photo, instead of opening Windows Photo Viewer in a new window, the photo will be displayed directly in the Immersive Explorer window.