Firstly, Boot Camp is not an emulator. It is simply a wizard of sorts to help you create a Windows partition on your hard drive and install Windows drivers for Apple's hardware. It it will run once to establish this, then you will dual-boot (and windows will run natively).Â
You will have to reboot your computer in your OS of choice, which is a pain, but you can run any Windows app without the slowdown or quirkiness of an emulator.