Just before the weekend an interesting tale of PC gaming on 4K monitors was uploaded to the official Microsoft Extreme Windows Blog. The twist is that Microsoft's Gavin Gear used three such monitors in an AMD Eyefinity setup, powered by ASUS HD 7970 DirectCU II graphics card(s). The result was a super wide 11,520 x 2,160 pixel display (24,883,200 pixels) upon which the writer enjoyed "an amazing set of experiences" including a Dirt 3 session.
http://hexus.net/tech/news/graphics/58305-microsoft-blogs-pushing-12k-pc-gaming-boundary/