The iOS 7 folders are quite hideous when you open them. The tiny blurry folder background that appears behind the application icons obstructs your Home Screen wallpaper and doesn't even appear visually pleasing to the eyes.

You can change this with a new free jailbreak tweak called FullFolder by iOS developer Lizynz. There have been a few full-screen folder jailbreak tweaks that have been released, such as FolderBoard,