it's looks like just control panel for all your clouds. If you have only aws, i don't see any profit of using this.
At my previous employer the loaded TCO for running in-house OpenStack was 45-50% of AWS (the company used both).
If you have the talent and scale it's certainly doable, and like I said, we were at less than half of AWS. There are plenty of examples, one that comes to mind that is NOT hyper-scale is Server Fault.