8.1 added a live wallpaper to the start screen

Computer Store News: Windows 8.1 offers users more personalized options, such as allowing the desktop and start screen to use the same wallpaper, and adding many beautiful background images to the start screen. However, there was news that the start screen can also use live wallpaper, which we did not see in the Windows 8.1 preview. Nothing does not mean that tomorrow, Microsoft does plan to provide users with a start screen live wallpaper, just wait until the Win8.1 RTM version is officially released. This news is very reliable, because in Windows 8.1 Build 9471, the system has added a new live wallpaper.
In the Charms sidebar, select “Settings">, click “Personalization", the top column is the wallpaper provided by Microsoft, including the new live wallpaper, double click to select. The live wallpaper changes as you scroll through the start screen.

Windows 8.1 Preview

Windows 8.1 Build 9471