It's possible develop a 'global marketplace for cloud resources' to enable organisations to buy or sell extra computing capacity, without the hefty financial commitment of acquiring new data centre capacity. 

Cloud offers organisations "instant access to external computing power worldwide, while also enabling businesses with excess server capacity to offer their resources to businesses around the world." 

Companies therefore with an excess of server capacity can offer it worldwide through the trading platform. But companies in need of extra computing capacity can also buy capacity, as needed, without a long-term contractual commitment. 

What do you think about? Do you know examples?