Bootcamp is also useful for helping to place a legacy (MBR) partition in place before starting the installer, ensuring that Windows goes to the right spot without disrupting the OS X install and GPT partitioning.

On the driver side, most are just normal PC drivers, provided by Intel, AMD, NVidia and others. The driver installer that Bootcamp creates runs them all with silent installs, making it pretty quick to be up and running. There are Apple specific drivers too, allowing control of the screen brightness, trackpad, and other Apple specific pieces of hardware. It also adds a utility allowing the default OS to be changed back to OS X to reboot to.