A pred-ICT-ion from IDC in Worldwide Public Cloud Platform as a Service 2009Vendor Shares ($). Platform-as-a-Service (PaaS) will be the next battleground after Infrastructure-as-a-Service (IaaS) becoming mature. I agree with that, although before companies will invest in PaaS, the business models have to be changed to support Software-as-a-Service. Not the technological aspects like multitenancy, but the subscriptionmodels and service levels.
In my humble opinion, the SaaS battle has to be settled before the PaaS battle can begin.