In the past, appetizers were known as a way to add to a dinner bill with food that can be prepared slightly faster than the rest of the meal (unless it's chips and salsa) for people who couldn't wait for the entree to arrive. But in my mind and in the mind of the author of the Wall Street Journal article I read today, this idea has evolved.
Came across this article in my Wall Street Journal Google Reader a few days ago and wasn't so sure it had a purpose in my life. But, the more I think about it, the more it does apply. I'm pretty scatter-brained and have been known to forget items when I'm at the grocery store--generally the ones I wanted/needed the most.