I feel most of this will consolidate and become all-in-one packages soon. In meaning, as we progress, more and more of these services will start to include more than just what they originally were built for. For example, you may used to run R scripts in Azure ML in order to predict data that stored in a RDBMS somewhere. But, you can easily just do it in Power BI too.
PaaS needs to catch on more IMHO.