Actually, you can Ctrl+Shift+Click anywhere on the Start menu in Windows 7 to get this menu, not just the power button. In Windows 8, it was also added to the ctrl+shift+click menu on the taskbar as well.
Ctrl+Shift+Click (and sometimes just Shift+Click) works all over Windows Explorer to provide extra context menu options. For example if you Shift+Click on a jumplist program item, you'll get more options on that menu as well (Run as admin (Ctrl+Shift+Click on the taskbar icon to invoke this as well)).
There's even more new in Win8 (I don't have Win7 handy to test on, not sure if these were in there too): Shift+Right-cclick will give you 'Open in new process' and 'Open command window here.'
Edit: Thanks SquareWheel - you're right only Shift is needed for 'Open Command window here' and some other options.
Ctrl+Shift+Click (and sometimes just Shift+Click) works all over Windows Explorer to provide extra context menu options. For example if you Shift+Click on a jumplist program item, you'll get more options on that menu as well (Run as admin (Ctrl+Shift+Click on the taskbar icon to invoke this as well)).
There's even more new in Win8 (I don't have Win7 handy to test on, not sure if these were in there too): Shift+Right-cclick will give you 'Open in new process' and 'Open command window here.'
Edit: Thanks SquareWheel - you're right only Shift is needed for 'Open Command window here' and some other options.