I think this has been the case in a lot of elections. When Nixon beat McGovern or when Reagan beat Mondale, I don't think we had a lot of swing states. So all it means is that one candidate is much stronger. Americans don't like that, so it would swing back eventually, or in a more extreme case the more powerful party would eventually splinter.
In the final seven games of the 2013 season, the Chiefs averaged 34.6 points per game, scored 38 points or more 4 times, and went 2-5. The NFL has ruined the sport.