The most recent polling data from the Pew Research Center has found that support same-sex marriage has risen to 45%, up from 42% last year. Opposition currently stands at 46%. As you can see from the chart, support for same-sex marriage has steadily increased, and opposition has steadily decreased since 1996. It doesn’t take a prophet to predict that unless social conservatives start making a persuasive case in the public square real quick, those who oppose same-sex marriage will be in the minority within two years. In some parts of the country (Northeast, West), this has already happened.
Support for abortion rights has also risen back to 2008 levels, after a substantial dip in 2009 (47% in 2009, 54% now). I have a feeling the dip in 2009 was due to some sort of sampling error. It seems too unlikely to me that public opinion would change so fast, and then change back just as quickly.