The basic truth that they're all talking about is that conservative white men not only cannot win elections anymore, but that that demographic is shrinking not only as a percentage of the electorate, but as a group. Additionally, the spread on the groups that Obama managed to win over (women, minorities, young voters, etc) is wider than the spread of the groups Romney was able to take.
I was also watching a Wall Street Journal analysis that brought up an interesting point. Before the Democratic mantra with regard to big business was that you could win without them in your corner directly, but you couldn't win with them aligned against you. However that is exactly what just happened.
Obama's election success is really founded in getting people to vote who didn't used to, and despite what everyone said after 2008, getting them to do it again four years later. In particular, at least from my perspective, I feel like Obama, and the Dems in general if they can keep this up, have a really serious advantage with new/young voters. Specifically, those of us (which is pretty much all of us here) who came to political maturity under Bush. Traditionally young voters, well, aren't voters, but seizing the huge dissatisfaction among young people, who tend to be socially progressive, with eight years of social stagnation and feeling helpless to do anything about it, and telling them no, you can do something about it, and getting them to the poles in droves is going to pay dividends for years to come.
Now, I'm not saying Obama has been the greatest champion for social justice these last four years, but I don't feel like I need a pair of those glasses from They Live so much anymore.