Amr al-Dabbagh has no doubt that if he builds it, they will come. The governor of the Saudi Arabian General Investment Authority (SAGIA) is one of the forces behind King Abdullah Economic City (KAEC), a $27 billion development rising out of the desert 62 miles (100 km) north of Jeddah, and he can already envision the arrival of its first residents. "It won't be long before it starts taking shape," he says.
There's a palpable sense of urgency at the construction site, where a line of high-rises--the first batch of offices and residences--is taking form along the aquamarine waters of the...