It isn't just a great cast , subtle, clever writing or the beautiful, unselfconscious cinematography. I just think we could use more movies about redemption, about forgiveness and about responsibility. These are the themes the movie is ultimately about. It focuses on them and refuses to be drawn into side tracks. It doesn't talk about race. It doesn't get into rural poverty. It is about what it is about.
The basic plot centers on an old hermit (Robert Duvall) who comes to town to pay for a funeral he wishes to hold while he is still alive. There is a reason beyond the surface reason for this and, gradually, so does everyone else.
Saying the lead actors put in superlative performances is redundant. When was the last time you saw Duvall or Sissy Spacek phone one in? Bill Murray who does sometimes phone them in (in my opinion anyway) is subtle and doesn't chew on ANY scenery. It is like watching him in his better roles through the years.
I saw this film in a theater were the average age was 100. And that was skewed down by the fact I had my 13 year old son with me. When the movie ended he turned to me and said "That was a good movie." He is a big fan of Transformers too but he, and I suspect many other kids, would be just as likely to find the appeal in well made, funny, touching films like Get Low.