Images matter, representation matters. I remember reading a study that showed young white boys were significantly more confident about themselves after watching TV than any other group of children. All the children reacted positively when they saw someone who looked like them on TV, and since white boys were represented the most (by far) they felt the most positive. IIRC the Asian, Hispanic, and Black boys/girls were the least positive, and white girls were also low.
The positive image of a calm, intelligent black man being president of the United States is huge for black children. We also need more positive images of black people. Not saying we need a bunch of Leave It To Beaver type shows on TV, but black people in positive media roles is important and severely LACKING right now.
We also need to combat the mentality that positive=money. Being rich and flashing your jewels doesn't mean you're a positive image.