Where them buttons at?

Last night, my wife made an interesting observation about iOS7: "It's very pretty." She said. "But If I'd never used an iPhone before I wouldn't have a clue what to do. All the buttons have gone."

It's true. In the rush to be more sophisticated than everyone else, have Apple lost site of making life easy for new users? But, with over 1 billion people worldwide already familiar with smart phones, should they even care?