Because modern warfare is ww2 is scifi fps. We're back to scifi fps, so in 4-5 I expect a real sweet looking landing at Normandy to happen and we'll all suck it up because we're super tired of scifi fpses.
We better get some futuristic weapons and shit. I expect railguns, mach 10+ airstrikes, orbital satellite positron cannons, laser-based weapons / phase weapons, invisibility cloaks, tiny&robust spying equipment, and at least 1 mission in space where you shoot laser cannons at enemy ships.