This is, of course, an anti open-source move. So, Cloudera Manager will win, there. The stack will go largely proprietary, as this is a defensive move - AWS are just killing them in the cloud. They need to prevent AWS just repackaging the Hadoop core and reselling it - what better way than by making your new platform AGPL-v3 or something, so you're still open-source, but AWS can't just resell it as EMR.