I think the answer depends on what one is actually working on. When I worked as an equity trader, having multiple monitors was a godsend; it eliminated the nee

I think the answer depends on what one is actually working on. When I worked as an equity trader, having multiple monitors was a godsend; it eliminated the need to flip through at least five different systems all on the same monitor. At home, I have a Windows laptop and Mac desktop that I will often switch between while programming, and I don't feel that using both of them at the same time makes me anymore productive. If I am programming in C++, I will be using Visual Studio on the laptop, and if I am programming anything else, I will be on the Mac in vim. I would only stop to look up something on the other, but usually if I stop to look something up it is because I am frustrated with some problem, and at that point I usually take a break from code just to clear my mind.