This post put a big stupid grin on my face, just imagining him walking around, and nobody knowing who he is. Him being far more influential and more important than most people in the room, and yet having trouble explaining what he does. It sounds like a family reunion trying to remember people names and telling everyone you make web sites for a living.
That's not true. There were many people in that room who were critical parts of multibillion dollar franchises. So critical that if that person fell ill the franchise would have to stop. If Linus fell ill Linux would continue relatively unchanged.