The lovely MacBook and MacBook Pro will be introduced starting sometime in October, giving ThoughtWorkers the opportunity to choose between a Dell and a MacBook for their company issue laptop. Now how cool is that. Not much of a decision to make there, eh?
A Mac with Boot Camp would even allow you to boot into Windows as the primary operating system for things like playing games. For everything else Windows, there's Parallels. And don't get me started about the oh-so-usable OS X.