That's crazy! Getting married and then moving in together? I couldn't imagine ever doing this. I have been living with my girlfriend for about a year and a half officially, but stayed with her nightly for the majority of our relationship. I realize it's probably too late now, but living together is definately going to be the tough part. What you think of her now is going to completely change once you see her habits and she sees yours. If you are lying to her about your video game playing time, she is going to be upset once she sees how much you play. Hopefully she already knows going into this, but you're looking at quite some time to get comfortable with each other and get a handle on the homelife (housework and such, sharing the television, etc).
Congratulations, but wow. I just couldn't imagine. I think I'd sooner save myself for marriage than wait to move in together, lol.
The Kinect is a good way to get her interested. My girlfriend and I might as well be married, but she hates gaming. Thinks its stupid and a waste of time. We manage by me playing when she's doing work, at the gym, asleep, etc. I don't mind because she goes to bed early anyway, so it gives me enough time for gaming and time to spend with her. Our only "issues" with it comes when she wants to get some housework done and I am not interested in doing it right then. I don't need hours and hours of gaming a day, and some days go without turning on the Xbox at all. You'll figure it out though.