Just like Amazon they are adding their own custom services to the package which is easy to consume. This can be storage, authentication, federation, messaging,

Just like Amazon they are adding their own custom services to the package which is easy to consume. This can be storage, authentication, federation, messaging, queueing, etc. And like Amazon they are building their own services (like AD in the cloud, Xbox Live, hosted exchange, Office 365, etc) on top of this infrastructure, so like for Amazon, the infrastructure they are selling literally comes for free.