tbh peeps who ask why so many are obviously the ones that never really tried or made good use of multi monitor set ups. in my opinion you can never have enough
Yaka is right. You got to see the full potential of Eyefinity. See how others are using it (and gaming on it). I give credit to suiken_2mieu for his old 5x1P (8000x2560) setup for sparking interest.
This setup is for gaming when I'm not reading, doing Excel, VM's or troubleshooting Eyefinity. Originally, this was for WoW multiboxing, but that was a long time ago. Now, I'm playing Wargame: AirLand Battle and Strike Suit Zero at 8000x2560 with native support. It's a lot more immersive.