Dual monitors mean you get to use more screen real estate to look at pr0n…do web design I mean. But what do you do when you system is sitting idle and you are stuck looking at the wallpaper? I mean, you could use separate wallpapers or if you are really boring you could use the same wallpaper twice. But I think it is even cooler to use one huuuuuuge wallpaper that fits both your monitors.
These are meant for 1280×1024 resolutions so usually that will be 17″ & 19″ LCDs and whatever CRTs you wish to go with.