Spot on localzuk!
Not sure if the Google EULA-hula is still the same but would you trust your entire infrastructure to this?
Discussion on: Inside the Google Chrome OS security model | ZDNet
The danger is that once you move your infrastructure away you won't get it back due to the costs of starting again from scratch so if Google one day decides it's got enough market share and hikes the prices up... what can you do then?
The Cloud is a service, one of many different pieces of the overall jigsaw to be used in the right place based on its merits and disadvantages. It's not the entire solution, reminds me of "universal fit" car parts... fits all, fits nothing!