Apple product lovers, your iPhone and iPad interfaces will look radically different this year.

At Apple’s annual Worldwide Developers Conference (WWDC), held at the Moscone West Center in San Francisco, Apple CEO Tim Cook and other company executives unveiled new operating systems, iOS 7 for i-devices and OS X Mavericks for Macs, as well as a new version of its MacBook Air and a sneak peek at the next MacBook Pro.

The best way to describe iOS 7’s new redesigned interface is that it looks like a crystal-clear pane of layered glass with elegant “flat” icons and features.

Simple and clean, Cook said, it is the “most significant iOS update since the original iPhone [debuted].”

iOS 7 will be available on the iPhone 4 and newer, iPad 2 and newer, iPad Mini and the fifth-generation of iPod Touch, starting in the fall.

Visit apple.com to view the keynote and marketing videos.