IPHONE - ITS IN THE DISPLAY

The iPhone’s display is excellent. Yes, it’s big and bright, but its most impressive trait is its high resolution: It’s 160 dpi, more than twice the traditional Mac screen resolution. Jamming that many pixels together in such a small space means that everything on screen looks smooth, not pixelated. Digital photos and videos look gorgeous, and even the colorful icons on the iPhone’s home screen are so bright and clear that sometimes it’s hard to believe that you’re looking at a computer screen and not something physical, like a sticker. On-screen text looks sharp, more like printed text in a book or magazine than drawn with pixels on the screen.
Of course, the iPhone’s screen isn’t just for looking at: It’s the key driver in the device’s interface. Using the iPhone is a tactile experience—it’s all about touching your fingers (or, if you’re daring, your thumbs) to that screen. Instead of dragging a scroll bar or clicking a mouse, you move through screens on the iPhone by a combination of taps, flicks, and other finger gestures.
The original Macintosh changed the world by providing a physical control to move a cursor around on a computer interface. But the iPhone does it one better—instead of pushing around a mouse in order to make a disembodied arrow or hand move up on the computer screen, it’s your finger doing all the moving. When you touch a photo, Web page, or e-mail message on the iPhone and slide with your finger, it moves along with your touch, as if you were moving a real, physical object. There’s no cursor on the iPhone because your finger is your pointer—which, despite what your mother might have told you, is just what fingers are designed to do.