Meet the Life Hackers: Here is scientific proof that bigger computer screens make you more productive. The stats are buried in another article about general productivity (I think — I didn’t read all of it).
On the bigger screen, people completed the tasks at least 10 percent more quickly – and some as much as 44 percent more quickly. They were also more likely to remember the seven-digit number, which showed that the multitasking was clearly less taxing on their brains. Some of the volunteers were so enthralled with the huge screen that they begged to take it home.
In two decades of research, Czerwinski had never seen a single tweak to a computer system so significantly improve a user’s productivity.
Incidentally, Joel Spolsky has believed in this for years: everyone at Fog Creek apparently gets two 20” flat screens. One of their employees — an evil, boastful bastard named Michael Pryor — even went so far as to taunt everyone about this in a comment on this post.