What if Now is All There is... Then What?

I just had a shocking and scary realization and it is that life is merely a series of "now" moments. It's as if up until now I has somehow assumed there would be something more, some alternative place or dimension that would be better than "now". In this other place things would magically happen for me and I would be happy. I have many times been taught about the importance of living in the present. For some reason though it's only now that it's sinking in with me what this really means. Because we have no choice really. We have to live in the present. Why? Because the present is all there is!