Via Ars Technica: "Gaming is a visual medium, and it's amazing to think how much information we have to take in almost instantly to play games. Especially in action games, we need to be able to quickly take notice of subtle movements and the state of numerous dials and displays that show us how well or poorly we're doing in the game. To do that, we have to be able to absorb a large amount of color information. What does that soldier's uniform look like? Is that a red or green mark above an alien's head? Is he on my side, or is he an enemy? Now imagine that much of this crucial information was removed from a game; the challenge of dealing with situational awareness would increase very quickly."