Simply Beautiful PE is created from the same texture pack from the PC version of Minecraft. This is a high resolution pack (128×128) which means, it makes the game amazingly detailed and less pixelated if you compare it to the original textures of Minecraft (16×16). It surely makes the graphic design in Minecraft PE look much better. Here are a few images to prove my point.
All credit goes to Iden Dark and Sparkelz99