True on American, and probably on many of the other better airlines as well. In fact, most coach seats on American seem to have power ports, but you should check the seat diagrams closely before booking if that's important to you.
However...I don't believe the aircraft powerports are the same as auto. The connector LOOKS similar, but I'm pretty sure it is a completely different item -- and they are quite expensive. I've seen them from $100 to $150.