Blu-ray is developed for high definition video and high-capacity applications - a single-layer disc will be able to store 25GB of data and a double-layer disc will be able to hold 50GB of data.
“Apple is pleased to join the Blu-ray Disc Association board as part of our efforts to drive consumer adoption of HD,” said Steve Jobs, Apple’s CEO. “Consumers are already creating stunning HD content with Apple’s leading video editing applications like iMovie HD and are anxiously awaiting a way to burn their own high def DVDs.”