If you guys are talking about The Day Z, DO NOT BOTHER. That game is so horrible that I'm not going to touch it ever again. Stick to the ArmA II mod if you have to!!
The same guy incharge of developing The Day Z was the same guy incharge of Big Rigs: Over the Road Racing (google that game and see the "amazing" reviews that game has!) Oh, and they lied about the features in the game on Steam, causing people to ask for a refund. Those people were BANNED permanentally from the forums and the game.
What OP means is that CoD is setting a "standard". If you have ever played Unreal, Quake, Battlefield, or any other shooter you'll notice how it's become increasingly more...casual, I guess you could say.