It just seems to be a reflection of moderation in both parties and they'll have to learn how to live with each other, as that's what a government is. You've got two basic groups that are coming together: a lot of Republicans are leaving the GOP as it has been taken over by the christian coalition which actually interestingly enough is $2 million in debt and just fired their new president, Reverend Joel Hunter, an actual christian who wanted to broach topics such as poverty, global warming, HIV/AIDS and compassion (instead of just gay marriage).
So there will be a new Washington Consensus, maybe if more then 50% of the people in this country start participating on a regular basis we'll get more moderation in our political culture and politics in general as well as more liberalism but less of the bitter reactionary kind (and that means more younger people espeacially). Many people who are in the generation X and Y are moderately liberal, so if you begin to include the opinions of a lot of disenfrancized middle income professionals, people who are under the age of 40 and even into their 40's at this point, its going to make a difference.
The Silent majority is a term that really depends on the population you have available and who feels left out. A lot of the people who feel severely under-represented these days are college educated 20 and 30 somethings. It's a different base then either the unions or upper class trending elites so the democrats might end up being forced to compromise a bit to woo moderately younger disenfranchized reform voters. I mean reform sounds fantastic, but let's do it without a bloody class war.