The states choose how to apportion their electoral college votes and all currently assign them all to the winner of the popular vote in that state. But they could change the apportionment.
The National Popular Vote aims to get states representing 270+ electoral college votes to agree to assign their votes instead to the winner of the national popular vote. Currently, states representing 49% of the 270 necessary votes have passed laws to this effect (including Washington), which will come into force once enough states have passed the laws. It doesn't eliminate the electoral college, just changes how votes are assigned. See Hendrik Hertzberg's blog on the New Yorker webpage or http://www.nationalpopularvote.com/