Good Lord—that is badass. What you are seeing here is one of AMD's next-gen DirectX 11 graphics cards with an Eyefinity feature that allows you to use multiple monitors as a single display.
Specifics on the technology are being kept close to the vest, but a recent demonstration revealed, amazingly, that it runs on only one GPU. it also features several DisplayPort connectors—In this case, six 30-inch Dell displays were configured to run as a single 7680x4800 monitor.
Eyefinity is enabled through a combination of hardware and software being developed by AMD. On the hardware front, AMD's upcoming Radeons will sport between 3 and 6 display outputs of various types, DisplayPort, DVI, HDMI, etc. And those outputs will be managed by software currently dubbed SLS, or Single Large Surface. Using the SLS tool, users are able to configure a group of monitors to work with Eyefinity and essentially act as a single, large display.
Maximum PC witnessed XPlane 9 and Far Cry 2 running at full resolution on Eyefinity at 12-20 frames per second. HotHardware notes that an upcoming DX11 racing game, Dirt 2, was played at 7680 x 3200 with "perfectly acceptable frame rates." Hot Hardware also notes that there are plans to integrate CrossFire support down the line and that AMD has partnered with manufacturers to create ultra-thin bezel displays specifically designed for use with Eyefinity. [Hot Hardware and Maximum PC]