Gaming !
Not all graphic cards are able to support the 2560 x 1600 resolution. First off, it has to be able to display as many pixels with the standard DVI port, and for this, the card has to have a Dual Link type DVI interface. DVI is limited to 1920 x 1200 and the two TDMS signals of 165 MHz have to be combined to generate the 2560 x 1600. This is the case for all GeForce 7 / Radeon X1x00 middle and high end models.
In addition to being able to display this resolution, the next step is to be able to provide a nice framerate in games. The 2560 x 1600 requires twice the graphic power necessary for 1600 x 1200 and is also the reason it's imperative to have a very high end graphic card. For now, this means buying a GeForce 8800 GTX. Even worse, if you want to activate effects such as antialiasing with heavier games, you will have to add another one of these cards in SLI and that will cost you.
Finally, there is support of the game. They have to have this resolution available and really support it. Here, we have to say that the situation has really improved since the first tests of 16/10 monitors.
Once these obstacles are overcome and you play in full resolution, you will be amazed. Total immersion is guaranteed! If you have the right peripherals, keyboards, a fast mouse, joystick and steering wheel, it's even better than an arcade. Here is an example of the rendering with Toca Racer Driver 3:
Of course, you do have to have some distance between you and the screen, around 1.5m to 2 meters. Your field of vision will cover the entire monitor and one non-negligible advantage is that monitor afterglow will be less disturbing.
Game : Lock On, in 1280 x 1024 with the le VX922, in 2560 x 1600 with the 3007WFP
Game : Civilization IV, in 1280 x 1024 with the VX922, in 2560 x 1600 with the 3007WFP. With the Dell, it is better to zoom out a little to avoid having things being too big. The disadvantage is the blur effect that automatically occurs once we have reached a certain height. 
Inside the city
Game: Far Cry.
