Actually, the last time Christmas fell on Sunday, quite a few churches cancelled services because it was Christmas and people should be home with their families. This was the same year that many wanted to boycott Walmart for switching to saying "Happy Holidays" or "Seasons Greetings". They accused Walmart of taking Christ out of Christmas. I think a lot of people saw the irony of this situation. Christmas is about Christ, but don't expect me to give up an hour or two of my celebrating His birth to be in church to focus my attention and time on Him, whose birthday I am celebrating.
Yes, I do usually go to Christmas Day services, and the long service the night before. Unfortunately, I am going to have to work 7am-11am that day (as I work at an answering service and we can't have every Christmas off). Hopefully, it will be slow and maybe I can get off to go to the service anyway (it starts at 10 a.m.). If I am not there this year, I will be there next Christmas. I love both the Royal Hours celebrated on the evening of Christmas Eve and the Christmas liturgy itself.