It's nice to see Facebook is aware of the areas which it lacks in. Just recently (in the last couple of days), there was an article clearly saying how mobile developers are in fact turning away from Facebook, for a variety of reasons. Acquiring Parse is not only demonstrating acknowledgment of this problem, but also providing a potential solution and way to tackle the problem.

Congratulations to the Parse team and good luck in helping to bring more developers to Facebook's platform! Given Parse's success so far, I don't see how or why Facebook shouldn't benefit from this acquisition.