In the feature, about the potential of using mobile devices and their features (voice communication, location, text communication, contexte sensitivity...) to play:

The rich potential space created by these powerful tools is just now being explored by software designers and by the users themselves. The more powerful our phones, the more fun they are to play with. (...)We are the first generation of humans carrying powerful personal computers in our pockets. What kind of collaboration is possible? How can we find and organize our contacts and connections in an entire city? By playing together, we come to understand the shape of wireless living.