In Pictures: Leaked features in Windows 8.1 Update...
Search and Power buttons on the Start Screen
On the Start Screen, there will be a Search tool icon and Power button set to the right of your user account picture.The search icon is simply a shortcut that will open the search tool in the Charms bar. Clicking this power button will give you the options to sleep, shut down, or restart your computer.
In Pictures: Leaked features in Windows 8.1 Update 1