Material is a design language introduced by Google. It's motto is to make designs look and feel more natural and real. For ex. shadows, colors etc.
WWDC 15 is the annual Worldwide developer conference held by Apple, in 2015. This project is made to show how Apple's design would look when it is treated with material style.
More about this on my website: http://byprithviraj.com/wwdc-15-gone-materialized