How to shut down windows 8

Spent a little time looking at Windows 8 developer preview and it appears this has been baffling a number of users. Found the answer on a you tube video here in the end

http://www.youtube.com/watch?v=5m6-ExUSFGQ

But knowing me, I wanted a more efficient way of doing this, (apart from the classic Win+D, Alt+F4), so noticed in the comments to this video that you can now use Win+I to get to the settings menu directly, and from there, you'll find a power button...