To 'surface' something (in this context) means something like "to expose", or "to bring to attention". It's related to the more literal meaning of the verb, which is roughly "to come up to the surface of the water (or other medium)", as in "the submarine surfaced after a week long dive". He's just using it to describe exposing objects and functions in Objective-C to the JavaScript context.

[insert communism comparison rebuttal here]

nitpick: JavaScript doesn't run on the JVM (not considering Mozilla Rhino)

I was considering Rhino (not the best example I admit), and Nashorn (which looks to be a fine implementation on JS)

The host of the video insert was distinctly biased on this issue.

Exactly what I signed in to say. They all look very nice but few of them feel original in any way.

I feel like CoffeeScript is failing at what it's attempting to do if it needs its own style guide.