I agree with most games these days being 70% Call of Duty shooters or killing zombies, but the original Wii lacked these types of games, again about the most games being zombie shooting games thing, you can blame Capcom for the "Let's make a new resident evil every 2-3 months, why? because we troll and screw the fans silly" It seems like a lot of Video Game companies follow Capcom's example because they don't want to lose to the competition being Capcom.
Basically these days, it will feel like your playing the same video game with different changes, example Halo 4 and COD:MW3, both are almost the same exact control schemes with few differences. But as of now, its Just a Shooter phase for gamers one time there was an RPG phase so it wont be boring forever.