New cloud infrastructure beyond the application services proposed above for single mobile applications will be needed to support such large scale collaborative mobile applications.
Cloudbased data mining services will need to scale to analyze large groups of people and the large quantities of data that they generate in order to extract collective trends among the population of users in real time.
In addition, new crowd actuation services will need to be created and scaled, such as recommendation services based on collective group context rather than individual context.
Privacy services that scale to large numbers of people, and preserve a sense of "collective privacy of the group" will become more important and will need to be devised.
Because applications servicing a region co-locate in regional data centers, there are ample opportunities for synergy.
Co-location enables intimate collaboration of applications and performance optimization which are not possible before.
For example, for file sharing, traditionally, the application has to transfer the file remotely.
If it is a big file, many applications will not work, e.g.collaborative games.
If the two applications are co-located, rather than sending the file, a pointer will be sufficient.
If server 1 of application A talks to server 2 of application B a lot, then the cloud provider can even co-locate these two servers in the same physical machine.