Windows 8.1 includes options to shut down from Start button and disable hot corners
In Windows 8.1, you can easily access the shutdown and restart action in the power user menu (the menu when you right-click on the Start Button / Hot corner of the start screen).
In addition, it will have the option to disable hot corners.
Please note that this information is from an alpha version of Windows, and things may change from now and the public beta coming out at Microsoft BUILD event, and from the public beta to the final release later this years.
Also, note that the above is from the Server edition of Windows 8.1, so it might be different.