The seventh generation of home video game consoles began on November 22, 2005, with the release of Microsoft's Xbox 360 home console. This was followed by the release of Sony Computer Entertainment's PlayStation 3 on November 17, 2006 and Nintendo's Wii on November 19, 2006, the following year. Each new console introduced new technologies. The Xbox 360 offered games rendered natively at high-definition video (HD) resolutions, the PlayStation 3 offered HD movie playback via a built-in 3D Blu-ray Disc player, and the Wii focused on integrating controllers with movement sensors as well as joysticks. Some Wii controllers could be moved about to control in-game actions, which enabled players to simulate real-world actions through movement during gameplay. By this generation, video game consoles had become an important part of the global IT infrastructure; it is estimated that video game consoles represented 25% of the world's general-purpose computational power in 2007.