According to Norbert & Diane Schmitt's academic text, jobs that require teamwork (increasingly common) are best performed in an open office.
Quote below with my emphasis:
How does a redesigned work space positively affect employee productivity? Studies suggest that work space, by itself, doesn't have a substantial motivational impact on people; rather, it makes certain behaviors easier or harder to perform. In this way, employee effectiveness is enhanced or reduced. More specifically, evidence shows that work space designs that increase employee contact, comfort, and flexibility are likely to positively influence motivation and productivity.
For instance, Amoco Corporation in Denver reported a 25 percent decrease in product cycle time (the time required to make its products), a 75 percent decrease in formal meeting time, an 80 percent reduction in duplicated files, and a 44 percent reduction in overall space costs after offices were redesigned to facilitate teamwork. Based on the evidence to date, an approach that matches office space to the sophistication of the work required is probably best. Jobs that are complex and require high degrees of concentration are likely to be made more difficult by noise and constant interruptions. Such jobs are best done in closed offices.
But most jobs don't require quiet and privacy. In fact, quite the contrary, jobs today increasingly require regular interaction with others to achieve maximum productivity. This is probably best achieved in an open office setting.