How do holes get heavy and superconduct?

We discuss the implications of recent de Haas-van Alphen effect (magnetic quantum oscillation) measurements on cubic CeIn₃, which reveal pockets of f-electron holes centered at Q / 2 in the Brillouin zone (where Q = [π, π, π] is the antiferromagnetic modulation vector). This system had previously been identified as a local-moment magnet in which the f-electrons are completely localized. We discuss the Lifshitz Fermi surface topological changes in these pockets that takes place in strong magnetic fields and that is likely to take place as a function of pressure. We further discuss the implications for pressure-tuned superconductivity and the relevance of the experimental findings to CeRhIn₅ and cuprate superconductors.