This will increase the price of Bitcoin Cash further.

I feel like Bitcoin Cash is very unpopular in online forums (HN, reddit) but its value increases still... any explanation?

Why is it unpopular?

Is it basically an UI, the newest Registry iteration, authentication and Docker's Swarm - as a service?

It's not a service as I would think of it. You download and install it on-premise as far as I understand.

I know they call it "CaaS", but I guess they are comparing it to using other PaaS's that can be installed on-premise, such as Cloud Foundry. Personally I find the term confusing, as I'm not sure who the consumer of the service is meant to be (developers creating containers? ops who get a platform for running them?)

The Circle.