Does this mean it will be (is?) possible to deploy Concourse on a single machine without the headache of BOSH Lite? I've wanted to use Concourse, but when all you've got is a Mac Mini, doing a full BOSH deploy (or even BOSH Lite) is quite a big ask.
Yup (is). You'd just run `concourse web` and then `concourse worker` on the same machine. If all you have is a Mac Mini there's one gotcha, though: currently none of the resources will run on OS X, as they're built as Docker images. So you'll still need at least one Linux worker somewhere.
I think the next step from us may be to start building Vagrant boxes that just spin up a worker, parameterized with credentials to register with a Concourse `web` instance. That way you can run Concourse on OS X for iOS testing/etc. and still have all your resources and Linux containerization when you need it via a tiny local VM.