I still have no idea how you switch off an iPad after using one for 20 minutes (we ended up just closing the cover and putting it away on the assumption it would sleep eventually).
And that just proves my point. You switch off an iPad by closing the cover; it goes to sleep because you've closed the cover.
On Windows8 though, I would love to hear the rationale behind putting 'Shutdown' inside 'Settings'. Most stuff that people have lost in Windows8 can be found by just looking in that menu thingy on the right of the screen, but burying the 'Shutdown' inside a submenu there strikes me as a little bit odd.