Here is a picture demonstrating the productive side of this technology: 

For consumer use, this technology is used primarily for gaming. Running a higher resolution across multiple monitors gives you a lot more viewing space. There is one drawback though. Some game developers limit your field of view. What this does is gives you a stretched-like effect when playing first-person shooters like Battlefield or Call of Duty. You don’t see nearly as much on the side monitors because it’s considered an unfair advantage. StarCraft II also released a hard-coded patch that will not let you go above a resolution that is not native to one monitor. There are ways around this, but the game developer has explicitly stated this will result in your account being banned.

Here is a picture of Dirt 2 running in Eyefinity:

Eyefinity runs on the HD 5000 series and HD 6000 series video cards. It is highly recommended that you run a crossfire configuration (typically running two video cards to power your displays) if you intend on running this system, because it puts a lot of stress on a single video card.

Eyefinity requires at least one port to run on display port. The ideal solution is to have all monitors running on display port and have a video card with an adequate amount of display ports to plug into. If do not have this configuration, you will need to get a display port to DVI active adapter to power one of your monitors, and the other two can be either DVI or HDMI.

Once everything on the hardware side is configured, you can simply go into Catalyst Control Center and enable Eyefinity. It will ask you to specify your primary display, which should be any monitor using a display port, and it will arrange your monitors to display properly. The last thing it will ask is if you want to use bezel compensation. This will adjust the resolution and leave a gap for the bezel, so that pictures don’t look morphed when going from screen to screen.