As Arch noted, there are over 1,000 benefits that hetero married couples have, that are denied to same sex couples. This is why the *federal* marriage laws need to be changed. I'm not saying the state laws are bad, here, just not enough. But then, if enough states change their laws, the federal gov't may fall in line. It's tough to say at this stage.
Right now, we've got a whole boatload of FUD** being pumped out there by various religious and political organizations causing problems. It's keeping the "horror" alive for the "normal" people, which is causing resistance to legal changes.
That's why I think if enough states change the laws, and after the initial press dies down, most people will realize that marriage equality really didn't affect them and then (hopefully) future legal changes will not be such an issue.
WR
**FUD - stands for Fear, Uncertainty, and Doubt. Generally means promoting emotionally charged statements to cause a strong reaction.