Marriage itself has also come to be more loosely defined, as more and more people are living with each other for long periods of time without being married, also known as "common law marriages", and others marry for reasons as simple as getting health insurance or citizenship.
Gay marriage is also gaining acceptance around the world and in the United States, something that was completely unheard of in the 1950s and 60s (or the 80s for that matter). So marriage is coming to be known as a legal, social contract between two human beings that commit to each other, more than it is between merely a man and a woman. Of course there are those who will disagree with that assessment, but I believe the writing is on the historical wall for that issue.
This really depends to a huge extent on where you live. Here in the United States, the dynamics of marriage have changed drastically over the last 40 years or so. As women have gained more economic power, they have also come to have more power in their marriages.
Decades ago, there were many more marriages between relatively high status men and low status women. The women depended on the men for their economic support and their social status. In such a marriage, the dynamic completely favored the husband.
In recent decades, warriages tend much more to be between people of equal education, earning potential, etc. In these new marriages, the two partners are much more nearly equal. This shows up in patterns of housework, child rearing, and other such jobs that used to be solely the domain of the woman.