Virtually everything about the look and feel of iOS has changed with version 7, including a refined typography, all new icons, and a dynamic color scheme. The new operating system was spearheaded by Apple's lead designer Jony Ive, and engineering head Craig Federighi.
As you move an iPhone in your hand, a new parallax feature will actually move the wallpaper in the background, allowing users to "see behind" the icons on their home screen.
All of the built-in applications have been completely rebuilt with a new look, including Messages, Calendar, and even the phone application.
"Game Center: We just completely ran out of green felt," Federighi joked. "And wood as well. This has got to be good for the environment."
In a demonstration of the new weather application, Federighi showed how dynamic weather effects are shown in the background, giving a visual representation of the current conditions.
A new gesture allows for easier one-handed use, letting users swipe from the left side of the screen to go back. Folders have also been expanded to allow multiple pages and hold more applications.
"iOS 7 is the most significant iOS update since the original iPhone," said Federighi, Apple's senior vice president of Software Engineering. "To create it, we brought together a team with a broad range of expertise from design to engineering. With what we’ve been able to achieve together, we see iOS 7 as an exciting new beginning."