One display is good but for people who transform certain devices such as their PCs to project videos or displays to more than one display device, the need for special cards that can do so may be useful. Something such as this Matrox M9188 card which allows you to project displays to 8 monitors should be the perfect resolution to your problem. Unfortunately, the Matrox M9188 card was made only for business and commercial needs. The card costs $2,000.

(Source) Oh Gizmo