The iPhone 4S will utilize the Apple-designed A5 chip, which according to Apple, allows for studios to make games with up to 7X faster graphics then iPhone 4, works with Unreal Engine 3. The stunning Retina display makes what you read, see, watch, and play hundreds of pixels better. The resulting pixel density 326 pixels per inch makes text and graphics look smooth and continuous at any size. The Retina display offers four times the contrast ratio of previous displays, so whites are brighter, blacks are darker, and everything is more beautiful.
Everything you see and do on iPhone 4S looks amazing. That’s because the Retina display’s pixel density is so high, your eye is unable to distinguish individual pixels. Which means text in books, web pages, and email is crisp at any size. Images in games, movies, and photos pop off the screen. And everything is sharper.