It doesn't prove that there is life out there, but it is encouraging. It does suggest that planetary systems similar to our own solar system might not be rare in our galaxy.
In a solar system similar to our own, with planets in the so-called habitable zone where conditions can support life, it is reasonable to assume that we COULD find life there, but that doesn't mean there MUST be life there.
With the way technology and techniques of discovering and examining extrasolar planets are advancing, however, I think we will find proof of life out there. It will take a while, we're not there yet, but I expect it will happen in my lifetime (I'm 50 years old).