Design and animation studio Gridplane has revealed one of the many mock-ups it developed for Microsoft as a potential user-interface update, which later became the NXE.
Tasked with creating new ways for users to interact with multimedia, this particular mock-up showcases some of the style found in the NXE.
Notably, the use of full retail packaging to list titles and the panes of information, such as the disc in tray image for Halo 3, can be found on current Xbox 360s.