So it appears that iOS 9 will bring new motion wallpaper for the iPhone 6s & 6s+. But, to me, they will come to the iPhone 6 & 6+ as well. Think about it, if the Apple Watch can show motion wallpaper, then the iPhone 6 & 6+ can as well since it is much more powerful than the apple watch. Besides, there is motion wallpaper already. With that said, I doubt they will introduce new motion wallpaper to the 5s or older due to the screen size and older specs. If I'm wrong, then i'm wrong. However, IMO, Apple wants to keep the iOS experience/features as close as they can between all their phones and I doubt the difference between the original iPhone 6 phones & the new and yet to be announce 6+ plus will be that huge that they can't put the same motion wallpaper on the original iPhone 6 & 6+.