Then next time there's something you want to do/change she'll remember you giving in on this issue, and chances are she'll be more than reasonable.
This hasn't been my experience.
As for Moranis' situation, this is something that he feels strongly about. It's an engrained habit that really isn't hurting anybody. If the cozy is small and unobtrusive, I think his wife looks at least as unreasonable as he does.
My wife and I have fights over stupid stuff frequently. I give in a lot, but I hold firm a lot, too. I think that if you give in all the time, you end up creating an expectation that you'll always be bull-dozed. Over time, that type of stuff leads to resentment, which unfortunately leads to all kinds of other problems in a marriage.
Marriage needs to be about give-and-take. It sounds like Moranis and Mrs. Moranis have a pretty good system worked out, since they rarely fight. However, if this is the line in the sand for both of them, I don't think the man needs to automatically give in.