If it runs Android, it can (and will) be rooted. That's the mantra of Android hackers, modders, and developers across the board, and today's root exploit proves it to be 100 percent true. How so? Because Bluestacks has been rooted. Yes, that Bluestacks - the one that allows users to run Android inside of Windows.
So, why would anyone actually want to root Bluestacks? Three words: Play Store access. By default, Bluestacks doesn't allow users to access the Play Store, and an Android device (though I wouldn't actually call Bluestacks a "device") without the Play Store doesn't provide a very good experience.