The new iPhone camera app includes a wide range of filters, but the star of the iOS 7 show is a new way to organize photos. The new Moments feature knows where you take your photos and you can also view your collection by years. You can tap and scrub to find what you're looking for even from within a huge collection of mini thumbnails.
There are new ways to share photos, too, including iCloud, which now supports video sharing as well. Other people can share into your Photo Stream now as well.