Yeah, ENDA is very important as well. It's actually fairly ironic that ENDA, which was basically never controversial and always supported by large majorities, is going to come after gay marriage which was intensely controversial and in the past very unpopular.
While ENDA has a support of even a majority of Republicans, it is tepid support while the opposition is quite vocal and likely to spend time and money to vote out those who would support it. That's why when it comes to politics, simply having a majority doesn't already get something done when when those in favor don't make it a priority and those opposed do.