This means that the netroots have some work to do. They've pushed people over the top, and fundraised for Obama; now they have to make it clear that if they're ignored, they're going to subject the party to bruising primary fights.
Obama's been making plenty of concessions to the right, and that's because they have the ability to make his job difficult, if not impossible. (They will anyway, but he clearly doesn't believe that. Yet.) The reason why he hasn't been making concessions to progressives is because he clearly doesn't believe they can make his job difficult.
And I hate to say it, because of the popularity of the man, but that's not doing anybody any good. He needs to be shown he can't ignore the people who were right about Iraq, Afghanistan, the economy and the Republicans.