Watch Apple CEO Steve Jobs kick-off the Worldwide Developers Conference with a keynote address from San Francisco's Moscone West. See the video-on-demand event right here exclusively in QuickTime and MPEG-4.

Microsoft started work on the successor to the Xbox in 2002, and they went into the project gunning for the top spot in the console market. Unlike the original Xbox's Intel x86 CPU and nVidia-based graphics core, the hardware that powers the Xbox 360 is custom-made from the ground up to run games, high-definition video, and digital audio.