The government can't establish or prohibit the free exercise of religion. Are churches that don't want to perform a gay marriage safe from this ruling or are we in for a wedding cake fight on this?
It is clear to me that the states would have eventually gotten to this point anyway as public opinion shifts so I don't think the ruling is a big deal, other than it is a big deal to same sex couples. The republic will survive and Adam and Steve can now enjoy the same marriage rights as Adam and Eve. I think that's good.
I think if you get into "forcing" churches to perform a service public opinion will not be on your side.