Neutrino physics with particle beams is bringing the study of neutrino oscillations into the precision era. Latest results from running experiments (NOVA and T2K) provide first hints on Charge-Parity violation and mass hierarchy determination. The next generation of experiments (DUNE and HyperKamiokande) will provide unprecedented statistics and thus will face new challenges in the control of systematic uncertainties. Thanks to their complementarity in detector technology and analysis strategies, the comparison and, eventually, combination of those experiments will provide strong and new ways to constrain such uncertainties. More fundamentally, the comparison of neutrino oscillation measurements at different energies and different baselines will allow to characterize neutrino oscillations in a complete and open-minded approach, beyond the limits imposed by the PMNS paradigm.