Public Cloud Only strategy - Uncompetative

I have watched Michael Dell's keynote on DELL EMC World 2017, and he said:

Anyone with a Cloud First strategy that is Public Cloud Only - I think will find himself uncompetitive for workloads that have predictable characteristics (see the video here).

Maybe this will change over time, but for now I fully agree with this.

From our experiance, even for QA environmnets that we can take down during the nights - we still pay more on the cloud than On Premise.