At WWDC today, Apple announced that the camera app has had a completely revamped GUI. I didn't see a lot of new features, but different shooting modes can be selected by swiping. You can move from a standard photo, to video, to panorama mode, and to a square 4 x 3 aspect ratio.
The are big changes are in the iOS 7 photo app, too. For the first time, Apple is letting you apply filters directly. Apple has also enhanced finding photos with a concept called moments, so photos you have taken will be intelligently grouped by time and location.
Apple has also enhanced Photo Stream with an improved GUI and the ability for others to drop photos into your stream. Videos are now supported as well.
Those are just the highlights, and we will learn more in the days to come. It's pretty clear that Apple has taken the best mobile photo system and improved it in several aspects.