What’s different about AWS compared to traditional vendors is they actually got this whole Cloud thing to work before they took it to market. And it still works, even as it grows exponentially. They turned the old market penetration strategy on its head: instead of idea → vaporware → marketing → sales → working product, they skipped vaporware altogether. Instead, their strategy was to get IaaS to work properly → idea → marketing → sales.
Read the entire post at http://www.devx.com/blog/iaas-like-amazon-web-services-aws.html.