It's odd, because I have actually notice the industry as a whole has become less violence focused recently. In the 2000s, it seemed that developers were keen to push the envelope when it came to violence as extreme gore was seen as a way to push up sales. Game series like Manhunt, Soldier of Fortune, and Postal existed specifically to showcase violence and little else.
These days, when we see extreme violence it's usually in the context of horror games and in this case is there to elevate the atmosphere. The gore in games Dead Space 2 and The Evil Within is not there for the sake of wallowing in extreme violence, but is instead there to disgust and shock the player. Sure, there are a few outliers but for the most part the industries' view on violence has changed. Of course, I probably have just grown used to it. Heck, I barely even bat an eye anymore when someones head explodes in a shooter.