Supreme Court refuses to review case lost by gender-segregated couple

In New York, same-sex couple Mickey Smith and Oren Adar adopted a boy then sought to have their names listed on the Louisiana birth certificate as his two dads.  When the registrar refused, they sued and lost.  The U.S. Supreme Court recently declined to hear the case, meaning their loss still stands.

Only six states have legalized gender-segregated marriage.  According to Lifesitenews these “marriages” and subsequent adoptions cannot be imposed on other states:

The ruling affirmed the distinction between “recognizing” the existence of an out-of-state order versus “enforcing” the out-of-state order on a state in which it conflicts with the state’s law. In other words, one state that allows same-sex marriage or same-sex adoption cannot force another state to enforce such an out-of-state law or order against its own law.

What impact will this ruling have on other cases, such as the ongoing custody suit brought by Janet Jenkins against Lisa Miller?  

Gay marriage is further down the slippery slope than you thought

Townhall columnist Michael Brown makes the case that polygamy is actually closer to traditional marriage than gay marriage is.  Now that gay marriage has already been legalized in six states is polygamy a shoo-in?

The offshoot of all this is simple: If we don’t have the wisdom and the will to resist the radical, gay redefinition of marriage, we will certainly not be able to resist the movement towards polygamy. 

This is exactly what opponents of gender-segregated marriage warned about.  If we mess with the gender prerequisite, next we'll have to revamp the number of participants (polygamy).  Then what, the age requirement?  The relation?  How will traditional marriage opponents dismantle it next?  Will they call a man's committed relationship with his 12 year old nephew a "marriage"?