Apple posted a program call "<a href="http://www.apple.com/macosx/bootcamp/">Boot Camp</a>".
It is a software that helps user to use both OS X and Windows on the new Intel base machine.
Before the machine boots up and if the Option key is pressed, the selection between which OS to boot will show on the screen.
It definitely will affect the decision when a consumer think of getting a new computer. I wonder if boot camp will support when two hard disks are installed on the Mac Intel.