I just realized I've watched 'The Shawshank Redemption' 22 times and always wanted a different final scene for Red.
I think it would have been more powerful if the movie ended right on Red's bus ride west, leaving his future with Andy completely unknown and up to our own imagination... what's a movie ending you'd leave more open?
That article about Inception is right. Cutting to black right as the top starts to wobble would have been perfect. It would have made the whole theater question what they just saw, instead of giving us that long, drawn out shot. The mystery is the whole point.