It's not about excluding. It's about offering more graphic and physics features. So if your system has the ability then you see something a little different (better, but different). The inevitable result of this will be years from now when it will be possible to generate wake turbulence, for instance. Planes passing through flame and smoke will disturb the particles there. And the fretting about ground impact patterns from HE rounds will have to change direction, because it will be possible to more correctly model the effects of ground impact, material displacement, and shock wave. It's actually possible now, but in a game as complex as AH it is a matter of balancing the extras with smooth frame rates.