This is such a bloated space, and it seems like suddenly every major player has an experimental app (atom.io, brackets.io) - it seems like it will become harder for programs like this.
One thing I'm not 100% clear on who this is targeting. I have no problem using Bower and Grunt (or Gulp, or what have you) to set up my environment. It would be nice to see more support for those tools built in to CodeKit. I was excited to see Bower but it appears that it doesn't actually use .bowerrc files. Sounds like that may be coming but despite the claim that the author isn't trying to "lock in" customers, it definitely seems like he is by reinventing these things.
I'm sure the true target market are the same kinds of people buying Coda and other "simplified web development" tools. This tool just seems to start to drift into the "hacker" type who might quickly grow out of the capabilities of the tool and need flexibility on different platforms.