A video wall is a special multi-monitor setup that consists of multiple computer monitors, video projectors, or television sets tiled together contiguously or overlapped in order to form one large screen. This is the more affordable way of generating a large screen made up of multiple screens and provides superb flexibility. For quality, performance and life-span, check out LED walls.  

As technology improves, display technology improvements is what most people notice first. Some of the really cool displays produced recently are testament to that.