Will Xbox Live and Playstation Network become new iTunes?

Recently the band Motley Crue accomplished an unbelievable- and herculean - feat when their latest track Saints of Los Angeles registered more downloads on Xbox Live and PSN, as a Rock Band dlc, than iTunes. The band had deliberately released the track as a Rock Band dlc after research showed that gamers made up a sizable chunk of their fans. This might just be the precursor of things to come, though all tracks might not be more popular on online game services. This also gives a dekko into the digital world of the future when storage media will be tossed out of the window and digital downloads will reign.