Unfortunately, gamers are voting with their wallets. Their wallets are saying they want more generic run of the mill America! Fuck Yeah! military FPS games with heavy emphasis on multi-player over single player. I don't see this ending anytime soon.
I don't think it's a fad in America either. I think Americans have found the genre that suits them much like the Japanese have found jRPGs since the 80s. Japanese culture has heavy emphasis on manga reading (with involving storylines and characters) on trains and what not. American culture has heavy emphasis on guns, military, and war.
"Naturally the common people don't want war: Neither in Russia, nor in England, nor for that matter in Germany. That is understood. But, after all, IT IS THE LEADERS of the country who determine the policy and it is always a simple matter to drag the people along, whether it is a democracy, or a fascist dictatorship, or a parliament, or a communist dictatorship. Voice or no voice, the people can always be brought to the bidding of the leaders. That is easy. All you have to do is TELL THEM THEY ARE BEING ATTACKED, and denounce the peacemakers for lack of patriotism and exposing the country to danger. IT WORKS THE SAME IN ANY COUNTRY." --Hermann Goering, leading Nazi party member, at the Nuremberg War Crime Trials
Conservatives: Pushing for a small enough government to be a guest in your living room, or even better - your uterus.