Legacy corporates are abound, and they see the Internet unicorns stealing their lunch. They know
I first read Gregs original book on SOA many years ago, and recently pickup both his 37 Things / Elevator book, and this Cloud Strategy.
He starts off with contrasting Cloud to what corporates are typically used: procurement, predictability
He gives a brilliant explanation on the difference between making Digital things (watches, Encarta), and using Digital to change your business (Wikipedia, Uber, etc)