Clearly the way forward is to move to cloud be it bare metal, VMs or containers. One aspect of the current public clouds that is slowing this cloud migration is cloud lock-in. Every cloud vendor is trying to make it very difficult to move out once a customer has chosen their cloud.
In his session at 17th Cloud Expo, Naveen Nimmu, CEO of Clouber, Inc., advocated that making the inter-cloud migration as simple as changing airlines would help the entire industry to quickly adopt the cloud without worrying about any lock-in fears. In fact by having standard APIs for IaaS would help PaaS explode much faster as there is no need to support plethora of clouds by every PaaS vendor.