Was It All Just Something To Do?

I saw the movie Julie and Julia yesterday. I liked it more than I thought I would. I have to say, that it struck some cords with me. In a nutshell though, I was left wondering: If I do something that I am passionate about - that I enjoy and care about, that I am good at, and no one knows about it, I never get famous or publicly recognized - does that mean that it is less valuable, less important, less meaningful? Like Julia Child says at one point in the movie, "was it all just something to do?" I just don't know the answer to that and I don't know why it seems so important to me (and to others) to expand beyond my small sphere.