iOS 11 brings many new things on iPhone, iPad si iPod Touch, but also withdraws the sets of: Live Wallpapers (those with colorful fishponds) and Dynamic Wallpapers (spheres in motion).
It's not known why Apple give up these wallpapers, but most likely the new technology a iPhone 8 or iPhone 7S will no longer allow you to set dynamic wallpapers on Lock Screen.
In addition to Face ID, the feature that lets you unlock the iPhone or iPad at a glance, a set of new wallpapers appears. 20 wallpapers, of which: 3 x Aura - floral abstract3 x Earth seen from space, 6 x rare flowers7 x lines in six colors, which they represented in the past Apple's old logo and a black blank wallpaper.
If you want to have these wallpapers of iOS 11 before officially launching the operating system or setting them on an older version of iOS, you can download them both for iPhone and iPad from the links below.
Download iOS 11 Wallpapers - iPhone version
Download iOS 11 Wallpapers - iPad version
Most likely, on future versions of iOS 11 will live live wallpapers again. These have been highly appreciated by iPhone owners, and their retirement has not been well received.
Update: iPhone X use a wallpaper derived from an image of the set "iOS 11 Wallpapers for iPhone". With the launch of the final version of iOS 11 and the launch of the iPhone X, it is very possible that it will receive a new wallpaper, specially optimized on the OLED screen of the device.iOS 11 Original iPhone X iPhone 8 / iPad Wallpapers - Floral, Space & Stripes