I thought that at first too. In fact, I had to google how to turn off!
But then I thought, "The computer is currently in the 'on' state and now I'm setting it to the 'off' state. I guess it is a setting."
But then I thought, "How come I can't turn it back on using 'settings'. I'm turning it from the 'off' state to the 'on' state. That should be a setting, too!"
So here's a question: How to I turn off the mail app? And how do I arrange things so I can see an email and an associated document at the same time?
Why does the desktop feel like it's just an "app" on the same level as "mail" and "calendar".
Why call it "Windows" if none of the new, modern apps are going to allow Windowing?
And then I realized that now that I'm done writing my resumé so I can put away my Windows 8 netbook until my resumé needs updating and go back to fighting with gnome 3!