If your on a Macbook (Pro) you can just hit the power button then click shut down. There's a key stroke to get to the same window on non-Macbook (Pro) computers I don't remember it right now.
I don't think it's viable anymore. My restart and/or shutdown gets stopped if Safari has multiple tabs open and I don't acknowledge it's okay to shut down. I assume it would be the same if I had documents open, etc.