The ever-evolving field of electrical engineering [Reflections]

I was at a large hardware store, holding a power cord that I thought would fit my new home generator, when another shopper pointed to the cord in my hand and said that I had chosen the wrong connector. When I looked hesitant, he added, "I'm an electrical engineer, so I know things like that." Needless to say, I quietly changed my choice. But I started thinking: What are those things that all EEs know? What is the commonality of training and experience that holds us together as a profession, and how is it changing? What will it mean to be an EE in the future?