Device is only a key.

I've just think about the future of devices, personal device! When services are ready, The device on your hand will be the key to access the services.

First i though device will be personal server, But now it 's clear that Server will be on cloud and user will allow the service talk to each other.

The storage on device is only need for do some temporary purpose. But all data will be backup on cloud.

Devices are new data entry. Big Data will be.