Firstly, just to throw it out there, cloud computing is in no way whatsoever new technology, just FYI for those who don't know. It has been used extensively for 7-10 years by large software and services companies, and the concept was invented decades before that.
Secondly, here is where I stand on it in terms of gaming. The benefits it could achieve are staggering such as - No new hardware. No complicated setup. No game discs. No digital downloads. No game installations. No game patches, latency improvement, unified device gaming capability instead of "exclusives" forcing purchasing decisions and on and on.
My honest opinion, it won't work. Overutilization would crush its stability if it was depended on globally. Clustering, maintenance, monitoring, virtualization, storage, patching, and everything else that goes with maintaining a dedicated gaming cloud infrastructure will be EXPENSIVE. There is no way those costs won't be forced down to end users who mostly already don't agree with the premise of full cloud reliability. These demands would greatly increase and demand powerful local hardware when 4K is the new standard which, IMO is not that far away. Take a look at OnLive. It is a good idea of what we would be able to expect from dedicated cloud gaming - lower resolution and reliability issues rampant.
