Joe Louis will eventually be moving down...

Ali was ahead of his time. His style will never go out of fashion, they'll never be a time when people watch his fights and don't understand why he was special. Louis was special but his was more subtle, his style was simple. He hit hard. But Ali had incredible footwork, looked fantastic 90% of the time, so he'll never go out of fashion. That's the way I see it. ALI is arguably bigger than boxing anyhow.