In the bid for internet freedom, the service provider is one entity that must be eliminated. We need to be able to run apps independent of service providers, so that if, say, Facebook shuts down, we don't have to go somewhere else, because social networking would be a service of the internet and our machines, not theirs. At the moment, we seem to be moving in the opposite direction, handing over more and more control to new service providers, like website operators, app store curators and data accumulators.
Mokalus of Borg
PS - There will probably always be some servers involved.
PPS - I also realise the irony of posting this on a hosted service.