On the other hand, there was no concept of "rooting" your Windows installation, and the idea that you could only run apps approved by Microsoft would have cause

On the other hand, there was no concept of "rooting" your Windows installation, and the idea that you could only run apps approved by Microsoft would have caused immediate outrage and accusations of anticompetitive behavior. It's amazing how quickly Apple has been able to shift the Overton window, to the point where there's barely any reaction to Microsoft requiring approval for Windows 8 Metro apps.