In recent iOS 9 betas, Apple added new colorful wallpapers including colored smoke against a solid black background, and the same effect is likely to be fully animated on the iPhone 6S.

According to Apple, iPhone 6s and 6s Plus Wi-Fi connection speeds ... Live Photos fall into the category of "Dynamic Wallpapers," but iOS 9 also includes several pre-made animated wallpapers ...

According to 9to5Mac “sources” the new iPhone 6s and iPhone 6s Plus ... the feature comes across from the Apple Watch, in particular, a set of the animated wallpapers/ watch faces that ...