@wmf I should have explained better in my post that I am not talking about automating an existing AWS/Google infrastructure. What other companies are doing is they are generating automated scripts which will create an infrastructure for you and then you maintain it.
What I am proposing is a new PaaS service which will parse your configuration and create an infrastructure on demand, publish your application in that infrastructure and send you a working link back. The developer does not have to interact with the infrastructure at all.