i havent finished the story mode in Killzone SF even though i very very much enjoyed the single player in KZ3 and KZ2. but the online is just superb. gameplay is fantastic and i dont know how people say other wise. ill finish the story later but right now im getting addicted to the multiplayer again. i wish Sony would give this out on PS+, so that the community can thrive again.
It's because the multiplayer is using two separate images to make a full 1080p scene. And since the multiplayer is doing that, the singleplayer is too, just because.