Jason Fried has a good way to describe why our offices are the last place people go to if they want to get productive, uninterrupted work done. He reckons the involuntary distractions, which he sums up as the M&Ms (Managers and Meetings) are mainly to blame for the lack of productivity while we work, or ought to work.
When he asked people where they go for longer stretches of problem solving work, they give him three answers:
Locations (the patio, a shed, the attic…)
Moving Objects (trains, planes…)
Certain Times (before everyone is up, after everyone has left the office…)