I couldn't find a thread that was doing this for 2013 but I've seen it in past years and it seemed to help a lot of people out, including myself. Post the best album or the album you think is most worth checking out by each band on the lineup (or just a band you think some might not know much about).
Portugal. The Man - Church Mouth
Yeasayer - All Hour Cymbals
Aesop Rock - Labor Days
Danny Brown - XXX