Though modern means of warfare are much more sophisticated than a human wave, after playing the entire Killzone series, I can say with certainty that in their future - there is only degradation in the face of gritty technological progress.
That's awesome! Killzone 2 is the most hectic and crazy (in a very good way) FPS I've ever played. I love the style of the series, and contrast between the ISA and Helghast. It's like WW2 almost except very futuristic.