This post is definitely going under the narcissism category.
Normally when people enter AdnanoTopia (it's in reference to Dilbertopia, Dilbert's cube), their first question is usually, "why on earth do you need three monitors"?
I casually reply that It's because I'm so cool. They'd insist on knowing it "No Seriously?, why? Ok fine, I'll disclose the secret.
Now for the cubicle's picture, hopefully this won't happen to me.
Does increasing available screen space increases productivity? Not necessarily but it helps multitasking a lot. I've got a similar setup and home as well. The gateway LCD TV / Monitor; gives a false satisfaction perspective of doing too much.
Now if I can only plug-in an XBOX 360 to it...