CaaS is definitely the future of cloud. However I don't think ECS (IaaS+Container) is the way to go. In this approach, you still need to take care of the cluste

CaaS is definitely the future of cloud. However I don't think ECS (IaaS+Container) is the way to go. In this approach, you still need to take care of the cluster capacity planning, scaling, failover, etc. And at most time, there always are some capacity sitting idle in your ECS cluster. The evolution of CaaS would be sth. like hyper.sh. Due to its hypervisor nature, the whole cluster+scheduling thing can be made transparent to developers, who simply "compose" the app spec and submit to run.