When Retina first hit the scene in the iPhone 4, its new display was like nothing before. But, BlackBerry, HTC and others have caught up or even surpassed Apple's pixel-dense display. Now we can include the Galaxy S4 in that list. Its 5-inch Super AMOLED display puts out an eye-popping 1,920-x-1,080 resolution. You read that right. The Galaxy S4's monitor crams the same number of pixels into a screen 5 inches across as does a 27-inch desktop display. Using Sven's trusty pixel-per-inch calculator, the math on Galaxy S4's display resolution rounds off to an impressive 441 ppi, an industry high. By comparison, the 4-inch Retina panel on the iPhone 5 puts out 1,136-x-640, or 326 ppi. And with pixels, more is better. Galaxy S4 protects its panel with Gorilla Glass 3, Corning's latest; the iPhone 5 resists fingerprints. Display advantage goes to Samsung.