At that age it doesn't mean anything. Both of my boys went through periods at that age where they would favor one hand over the other, then they would switch and favor the other. I don't get it. At about age two or three you can be pretty sure that the hand they are coloring with is the hand they will use, though they could still be ambidextrous (had to look that one up in the dictionary.) My oldest son is right handed, but kicks a ball with his left foot.
Anyway, my point being that you really won't be able to be sure for another couple years.