The very first time I used this tool it blow my mind. It was showing me passwords I had used months ago (before formatting) from when I first got my Windows 8 computer. I had no idea Microsoft was storing that information to the cloud in the first place.
The network listed in the screenshot has to be from somewhere local. This system does not leave my house.
Lastly, I know Windows stores wireless passwords but I would think they would save it in an encrypted format. Maybe that will be included in Windows 9.