The most dramatic example is happening now in China, where a consortium of government and private capital is investing $30bn in a 100 square kilometre site - that's around six miles by six miles - to build the Beijing Cyber Recreation Project. Among other things this will house the infrastructure (computer server farms, electricity, online banking links, transport logistics etc) to host nine or 10 virtual worlds, each of which will be capable of supporting over 150m avatars. The Chinese are not constructing virtual worlds for fun; they are deadly serious. Although online games will be part of the mix, the underlying strategy is strictly economic: to boost the profits from the country's booming industrial base.