Inception- The Top: Still Spinning?

This is not a review of the movie, but just deep thinking about it. This post will be in both the “Movie Reviews” section and the “Deep Thinking” section.
I just watched Inception for the second time yesterday and it has to be one of the most thought provoking movies I have seen. Taking or planting an idea using someone’s dreams? A dream in a dream, in a dream? Tell me if I am wrong, but these aren’t things that we normally think about.
The main thing that people talk about after this movie is if the main character, Dom, is still in a dream at the end of the movie. It’s been going through my head ever since I watched it for the first time this past Saturday.
At the end of the movie, we see that Dom comes home to America and sees his children for the first time in who knows how long. He spins the top (his totem) on his kitchen table and approached his children. The last thing we see is the top starts to sway, indicating that it is about to topple. The next thing we know it, the screen goes black. End of story. End of movie.
But what happens with the top? We never see it topple, so therefore we do not know if Dom is in a dream or is in real life. I have my speculations about this matter, but it is a little hard for me to type it up. It most likely wouldn’t make as much sense as it would if I told it to you verbally.
What do you think? Is Dom still in the world of a dream or did Inception actually end off with him actually seeing his children, happily ever after?