This news is actually pretty consistent with the Ars Technica study on the most popular Steam games. In other words, most multiplatform game sales are still probably lagging behind consoles. It's just that the few games that are popular on PC happen to be extremely popular.
I'd say it's mostly that PC gamers don't play console games that much (especially since consoles aren't big in Asia minus Japan)
The most popular genres are Moba's, MMO, FPS and strategy. Only one genre is prominent on console and the only really popular multiplat FPS on PC is Battlefield (and CS if you want to count that).
