Quick Look in iOS 7?

So I'm not sure if this is new or not, but I was trying to set a picture as my wallpaper just now and I noticed this in the Share window:

http://imgur.com/Bq0ns2K

Quick Look! And tapping on it opens the image against a black background. I never thought this feature would make the jump from OS X to iOS, but I'm excited to see what it can do. Has anyone else seen this anywhere else in iOS 7?