Living in the moment can mean a lot of things to a lot of different people I suspect. To me I guess it means being truly present in what you're doing, about appreciating what you have in front of you and also appreciating life is short and the moment is important.
As a family and as I'm sure like most families we have experienced loss and I think for a short time at least it makes you stop and take stock and think. It makes you really think about yourself. about your problems, about what's important to you and what's not. I think when you experience loss or something dynamic in a family or a friendship group or a relationship you DO live in the moment - but it never seems to last.
Life moves on, things go back to normal somewhat, day to day chores and arguments and nit picking resumes and you forget how you felt. I feel like very few of us hang on to that feeling and truly live in that moment.