The Evolution of Robot Soccer
This is the official goal of the RoboCup soccer competition:
"By mid-21st century, a team of fully autonomous humanoid robot soccer players shall win the soccer game, complying with the official rule[s] of the FIFA [Fédération Internationale de Football Association], against the winner of the most recent World Cup."
We've seen a lot of improvement over the last few years, but nothing that compares to the skills that the new version of ASIMO recently displayed. And RoboCup itself isn't far behind.