State of Multi-Monitor Gaming?

xtal asks: "What's the current state of multi-monitor gaming? LCD panels are really dropping in price - I've seen a 17" panels for under $400cdn, bringing it into the ballpark where purchasing three of them for a much wider field of view becomes possible. The hardware to drive these displays in a LAN configuration (3 machines, 3 monitors) is also inexpensive, or at least attainable - so when I look around for the state of multi monitor simulation, I don't see much. The best candidates are flight sims, but my interest lies in racing. Are there any suggestions or sites I'm missing?" What games have you played that could have really benefited from a second (or even a third) monitor? Do you think that the games you normally play will be significantly enhanced by the use of multiple monitors, or is one enough?