In Easy DOS It, Cringely offers an unusual hypothesis — Windows Vista will run on top of OS X, in much the same way that Windows used to run on top of DOS:
So Apple will at least offer the option for users to run a virtualized version of Windows Vista atop OS X, which brings with it two HUGE advantages. First, the bad guys and script kiddies will have to get through OS X security before they even have a chance at cracking Vista security. Second, by running a virtual version of Windows Vista loaded from a read-only partition, Microsoft’s recommended method of dealing with malware (periodically wipe the OS and application from your disk and load them anew) can be done in seconds instead of hours and can be done daily instead of monthly or quarterly or yearly.By running Windows Vista this way, Apple can offer the most secure version of Vista available with the lowest Total Cost of Ownership, which could lead to a leadership change in business computing. Down with Dell and HP and up with Apple.