While I personally have no need for multiple screens (I have tried it out in the past, but almost always ended up just using one of the screens exclusively), I can definitely see why some people doing some serious multitasking can use it. I'm just doing 85% of my stuff in the browser, the 15% are dedicated programs that I just run over or next to the browser, or games that run fullscreen anyways. The only time I do technically use two monitors that comes in mind is when I'm capturing DV footage on a Mac while working on my PC, I can keep tabs on the tape yet continue doing other stuff, then it's quite handy, even though in my case it's not just two screens, it's two different computers! If I did more serious work with multitasking, then yeah, I might be inclined to use more screens on a daily basis