lincoln who?

My sister Joan and I went to see the new Steven Spielberg movie, Lincoln (starring Daniel Day-Lewis as Abraham Lincoln), and, being from a history-buff family, we both liked it.  But I'm thinking that today's average movie-goer, used to special effects, vampires, and  mindless sequels, would be wondering, "Who is this Lincoln guy?", "What's this Civil War they're talking about?  What country was that?", and "Do they give free popcorn refills at this theater?"