If K8S can be made turn-key, it will become possible for some deployments to realize massive cost savings by deploying across clusters of bare metal machines from hosts like OVH, packet.net, datapacket.com, and so on. The cost of bandwidth and processing power is just so much lower.

The only remaining headache would be database. Setting up reliable mission-critical HA Postgres is kind of a pain, and it's nice to not have to worry about it. If that can also be canned, then this kind of rig would be a really compelling alternative to the managed clouds... unless you need other things like S3, etc.