I saw this post in the morning but wanted a chance to respond properly...
So you've got a new baby, you've stopped work (in a job you loved), moved county (and culture) and started living with your DH after a long distance relationship... Dear lord I'd be amazed if you weren't feeling stressed/unsettled/trapped! oh and you've come to Mecca of all trailing spouses as I loving refer to HK - we've been here since August so I know a bit how you feel.
My DH and I lived apart for 6 months before our first posting - I swear the first few months after we joined him were the toughest we faced as a couple. I was use to doing everything myself - he was use to making his own decisions - and that was just 6 months. You and your DH have to re-find your relationship - and not even your old one, a brand new one with a baby and all the implications of that plus trailing spouse.
And then HK - well 9 months down and I'm still not convinced (my DH loves it too!) but come join us on living overseas - there are a few of us and they helped me a lot. I was 2 years elsewhere in Asia and loved it, but HK I've struggled with. For me HK can be great for mums, lots of social stuff, lots of non working mums- it can also be cliche and competitive. If you end up with the a group of the latter, move on and try again - honestly there are normal, friendly and nice people out there.
And for school - the bad side is you need to sign up now with your baby tiny to get on waiting lists, The good side is its really hard to find a "bad" school here. But all this is the future.
After all that dump of information the one thing that worries me - and it's a big one - is the lack of communication, or willingness to acknowledge your concerns. Now back to my first point could just be he's out of the habit... Or could be he's an arse 
But short term I'd recommend getting into the swing of HK (and some of us on the living overseas board can help) and see where things stand in a few months - once the baby is older, you've spent more time living together and you've got use to HK. If he is still not prepared to discuss then at least you know it's a decision based on him and your relationship and not on all the hundreds of other factors you've got going on at the moment
Good luck - and shout if I can help with anything!