Yes but Hawala requires that the agents trust each other. A Hawala-like network could be built by agents who do not trust each other. Users of the network would not have to deal with Bitcoin at all.
I don't know if such a system will come into being but it seems like most of the pieces are already in place. The biggest problem would be converting local currencies into and out of Bitcoin.
There's a portion of internet users who have decided that they really really hate Bitcoin and go out of their way to denigrate it and downvote anyone who doesn't share their views. I can understand the people who are skeptical, because Bitcoin definitely has its problems, but this seething hatred mystifies me...
Well, it did get a little crazy this summer with all of the articles and meta-observation about how viable the currency was vs "is HN being used to pump and dump the value".
It still was a fascinating thing to think about from a software point of view, IMO.