I think the current situation is a state of equilibrium brought about by technical limitations. A typical user has limited bandwidth, and limited storage. Tha

I think the current situation is a state of equilibrium brought about by technical limitations. A typical user has limited bandwidth, and limited storage. That makes the client server model very effective for something like video sharing or a social network and defaults to a particular economic model. But something like messaging can work more like a message queue. The basic storage and bandwidth requirements are low so you just download everything. Facebook, Google and Microsoft (Office 365) benefit hugely from this. But maybe Apple, or Telco's could break this pattern. Sell devices with massive amounts of storage that no one will use on their own. A 1TB IPhone with a good internet connection could make encrypted messaging a possibility for media rich apps or even make P2P possible.