Well, if you're developing for Windows, or developing for the web and need to test Internet Explorer, or if you're either doing UI design or dealing with other

Well, if you're developing for Windows, or developing for the web and need to test Internet Explorer, or if you're either doing UI design or dealing with other people's UI designs and need access to Photoshop or Illustrator, or if you're using Visual Studio at least some of the time, or if you're working with a MySQL database and want to use something like SQLyog... there's lots of tools on Windows that can be useful for developers, and someone can very reasonably conclude that Windows (through something like this) offers better access to nix tools than nix offers to Windows tools via Wine.