Shutting down using Win 8 takes exactly the same number of clicks as in Win 7. Alternatively you could just hit the power button and it'll shut down fine.
Alt-F4 from the desktop in Win 8 still works, as well. Being that I'm in the desktop a majority of the time on Win 8 and have always used Alt-F4 if actually needed to turn off my machine for some reason (who does this anymore?), so not much change for me.