elections, race, and television casting ponderings

With Obama's election, what are the chances of seeing more non-white faces as main characters in TV shows?

Is it likely to change people's perception now that there's a visibly non-white person up the front as the face of America? Will TV execs, producers, and writers adjust their glasses to make fiction a closer representation of reality, or will they retreat under the belief that the white demographic is no longer being properly represented? Will they do something else entirely?

Will we see change in this area in the next four years?