Using the real web on an iPhone is a wonderful thing. Apple has made their iOS browser, Safari, into a solid powerhouse of web-browsing goodness, ready to use out of the box, accessible in many ways to many kinds of people. It’s a great app.
And yet, the size of the iPhone screen, iPhone 5 included, can be a bit cramped. Add in the top address bar and the bottom button bar, and you have even less screen real estate to use for actual browsing. That’s why Apple included a new feature in iOS: full screen browsing.