This is Aero. It’s a 99 cent weather app that’s designed to look just like iOS 7.
We’re probably going to see a lot of new apps with the iOS 7 look, and a lot of old ones redesigned to fit the style.
We just hope to see more apps like this. It’s will be very distracting to see apps that don’t match the new look when switching around or launching a new application. However, app developers seem to know this, and they are working to make sure that their applications work as seamlessly with iOS 7 as possible.