Well, I do turn my head a bit - maybe 10-20 degrees to sides - when I play some FPS. Just imagine yourself, e.g., strafing out of the corner. Supposedly your EYES are still locked on display before you, yet you can rotate your head a bit. And this should mean a lot in such a detailed environment: make all these efforts to produce a precise acoustic environment and then to fail by ignoring head direction - so that sound would be inconsistent to picture on a fixed monitor before you? BTW, when I was younger, I played Counter-Strike, and on some maps you could camp nicely behind a wooden wall, hear someone coming on the other side and precisely shoot the guy with a few bullets. They all were shouting "cheater" for the first time, thinking you can see through walls... Nope. But when a man tries to establish precise source of some sound, one often turns his head to sides a few times. Something related to binaural hearing and psychoacoustic model, perhaps.
For those who play in headphones, not with 5.1 or 7.1 surround audio, a system that tracks head rotation and tilting (similar to what they have for airplane sims, where you wear hat with markers and a webcam tracks your head position... and view in displays is changed accordingly) is needed. I haven't seen any of those at the market yet. Maybe you've heard about such things?
Deus Ex. System Shock 2. The Witcher. Baldur's Gate. Planescape Torment. I'm ready to forgive Digger (c) Windmill Software, 1983, Tetris and Tapper for having no decent plot, though.
You know. I'm considering adding a substantial solar power to my suburban house. I live in Ukraine. There we just don't have an option to sell power to utility at all. So I will have to make second power network (low-power things like LED lighting) in the house, and maybe - just maybe - a quick switch device that would monitor power consumption of "usual" consumers and power it from solar if both consumption is low and sun is bright. I would be glad to have an option to use utility power as "endless battery" for $5/mo, after all, an hour or two of sunlight would repay this fee, and then I would have net profit (without any power consumption in my house). And I surely won't get, for example, as much lead acid battery capacity and max. current for $5/mo as I can with connection to an endlessly powerful utility network which is also nice enough to buy out my extra power (If batteries were at full charge, subsequent solar energy would be wasted)... I'd call this $4.95 "administrative fee for clearing energy balance" and go happily with it...
Iraquis? Serbs? er... Vietnamese? own schoolchildren?