If consumer networks were as reliable as roads and the electricity grid, why would I bother giving my data to someone so they can put it in a datacenter?.
The future I would like best is a device on the end of my home internet connection.
I could authenticate myself to other online services against it.
It could be a node in a social network (much like diaspora) where I can control all my own data.
It could have access to a NAS at home, allowing me to stream my favourite music and movies to wherever I happen to be.
In the future, with resilient enough networks, the datacenter will be distributed.