As some people hoped and believed, Apple has developed their own Optimus which includes Intel graphics as well.
From http://www.apple.com/macbookpro/performance.html
This is VERY welcome in order to get amazing battery life!
The 15- and 17-inch MacBook Pro models come standard with automatic graphics switching. Its a breakthrough technology from Apple that switches graphics processors on the fly to give you performance when you need it (when youre playing the latest 3D game, for example) and better battery efficiency when you dont (such as when youre reading email). MacBook Pro transfers the workload between the powerful discrete NVIDIA GeForce GT 330M graphics processor and integrated Intel HD Graphics so seamlessly, you wont even notice. Whether youre using applications like Aperture, Motion, or Final Cut Pro or just surfing the web, your MacBook Pro always knows which processor to use. You dont have to log out, shut down, or change your preferences. Automatic graphics switching does it all for you.
From http://www.apple.com/macbookpro/performance.html
This is VERY welcome in order to get amazing battery life!