2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/227288The potential of future high statistics atmospheric neutrino experiments is considered, having in mind currently discussed huge detectors of various technologies (water Cerekov, magnetized iron, liquid Argon). I focus on the possibility to use atmospheric data to determine the octant of $θ_{23}$ and the neutrino mass hierarchy. The sensitivity to the $θ_{23}$-octant of atmospheric neutrinos is competitive (or even superior) to long-baseline experiments. I discuss the ideal properties of a fictitious atmospheric neutrino detector to determine the neutrino mass hierarchy.6 pages, 6 figures, Plenary talk at NOW2008, Conca Specchiulla, Otranto, Italy, September 6-13, 2008High Energy Physics - Phenomenologytext