Throughout history, there have been people who have been able to operate their left and right hands or legs to an equal ability, either naturally or through sheer will and practice. In many professions, like in sports, it's extremely useful. In fact, there's not a professional soccer player worth their salt without the ability to control the ball with both feet.
In certain parts of the world (especially back in the day), if you were born left-handed you would be forced to learn to write with your right hand, which helps one become ambidextrous. There's no scientific evidence to suggest that being ambidextrous means you're more intelligent, but it's certainly useful and impressive!
To learn which colorful figures are ambidextrous, click through this gallery.