I call bull on the idea that men are only interested in sex, and that women should be grateful if husbands do anything around the house. It _can_ be like that, but it doesn't _have_ to be like that. I mean, how offended would we be as women if men were writing, and genuinely believing, that women don't care at all about sex and live to clean the bathroom. Please. We are more complicated than that. I'll grant you that men aren't as complicated as women, but that doesn't mean that they can't be equal partners in a marriage.
What did you two talk about while you were dating? When you were married but before you had kids? Start there. Ask him to show you how to play the DS game. My bet is that if you start talking about anything, you'll remember the man that you married. Hopefully you'll want to kick up an intimate relationship with that man : ) If you two are happy with each other, those hard conversations about helping around the house become much easier. "Hey honey, can you help me get the kids into bed so we can get into bed earlier, wink wink" is a much more satisfying conversation for everyone than "Why don't you see everything that needs to get done around here!" If he's shown you how to play the DS game, it's easy to transition into "can you show me what's happening with the online billing system?"
My guess is that your husband doesn't even see the problems that you are feeling. That doesn't mean that they aren't things you should work on together, it just means that if you blindside him with a litany of things that are "wrong" about your marriage, he's going to get defensive. But I would hope that if you frame things the right way, he can rise to the occasion and you both can work together to make your marriage work.
Good luck.