There are as many definitions and descriptions of 'The Cloud' as people writing on the topic! What is it? How about the industrialization of computing – or Henry Ford gets into IT! For sure it is not a whim or a fashion – it is a serious step in the direction of connecting and networking all of humanity and all our artefacts to realize sustainable economies and eco systems.
To do this will mean doing much more than the past far more efficiently with far fewer resources. And that means marshalling computing power, sensor systems, modelling, decision support backed up by artificial intelligences that complement our own. So here we have it:
All our data on line
All our applications on line
Freedom to use any screen on any device anywhere
Access to supercomputing power
Access to intelligent search
Work and life agents that tune to, and understand us
Industrial and medical support at the point of need
New 'Guide @ The Side' education systems
Training on demand
Needless to say; none of this is viable with all the memory on our devices – in our hand, in our pocket and on our laps. And it demands bandwidth to connect. The Cloud starts to become really viable and interesting when we have bi-directional connectivity @ 100Mbit/s and above.