I think it is important to remember that I am not my husband's mom, so you are absolutely right in that he should be focusing on his mother.
As the parent of a young child, he should definitely get you at the very least a card and some sort of gift or acknowledgment. At the same time, he does need to recognize and spend time with his mother. I don't think you need to be ignored, but remember that you are not his mother and therefore his obligation is not to you.
So yes, take the initiative while your child is younger and unable to really demonstrate their gratitude to you on Mother's Day and do what you'd like - sleep in, tell your husband if you want him to be sure to take you out to dinner, etc.
I have small children and my husband makes sure that they get me cards. On my very first mother's day, my son 'got' me a really nice Tiffany bracelet and then every subsequent year I've gotten a gift certificate for a half-day spa experience at my favorite place. I remind my husband every year "You don't need to get me a gift for mother's day but if you feel like you really do, the half-day spa thing is what I want." Yes, he really is one of those people who feels the need to *buy* me something on MD. We communicate, we're both on the same page, so everyone ends up happy.
Bottom line? Talk this over with your husband or you'll wind up like the women who eventually post on here, venting that their husband's didn't *get it* when MD came around.