shamless plug: i've also written a high level api on top of the chrome remote debugger chrominator [1]
similar idea. chrominator use promises instead of a fluent api. it also follows the selenium w3c spec where possible. it does cool stuff with evaluate and evaluateAsync where it resolves the remote object to something usable.
to be fair there are a few other projects i know about that wrap chrome remote debugger with a high level api:
* autogcd [2]
* ghostjs [3]
[1] https://github.com/jesg/chrominator