Actually, it seems like most PC guys don't understand it either.
Before complaining about getting a new engine, consider the fact that Activision is developing for 7-year-old hardware, and this is the only way they can get it to run at 60fps on consoles. Since console gamers are their largest audience, they're going to develop for consoles first, therefore using the older engine. PC version then uses the same outdated technology.
If PC gamers were a bigger market to them, they'd probably see fit to make a new engine. But that's not the case. And why would they make a new engine for consoles that are already going out?
Pretty much. They're still making minor improvements to the engine, but they don't give a rats ass about PC. Their primary concern is making it look good on current gen consoles. And theyre hardly alone in that. EA is still carrying that torch for PC with BF at least....doesn't even seem like crytek is really pushing it anymore.
FWIW, I totally get why PC gamers are salty about cod. The series started on PC and now it's treated like the bastard child.