There has been great progress in neutrino physics recently, with the solar and atmospheric neutrino problems finally solved. Now what? I will argue that this is not the beginning of the end in neutrino physics, but only the end of the beginning. Our new knowledge of the neutrino mixing parameters makes neutrinos a unique and reliable probe of astrophysics and cosmology, as well as allowing much more sensitive tests of new physics. After briefly discussing some of the past milestones, I will present the very promising future for opening new windows on the universe and the mysterious neutrino sector.