Update: Ignore the following as it is pure speculation. As Rich points out in his comment there are a lot of details, which are not clear, yet. And since he is not actively working on pods right now, it will likely take some more time before there is something more concrete.
Currently there are a few new things in the pipeline – eg. enhanced primitive support. One of the more mysterious additions are pods. Relatively little is known about them up to now. But in a recent interview on infoq Rich Hickey spoke a little about them. So let's have a deeper look at pods.