Current cloud application platforms for enterprise software are like “radio on TV”.
Like early TV programs that showed a (radio) announcer reading news off a page, the current a PaaS take the good-old models of application architecture and programming (basic request-driven SOA, Java EE, .NET) and place them into the cloud. The PaaS frameworks (CloudFoundry, OpenShift) provide some cloudiness, but the fundamental architecture of applications and application containers does not change.