Recent progress is subwavelength optics is driven by the physics of optical resonances. This provides a novel platform for localization of light in subwavelength photonic structures and opens new horizons for metamaterial-enabled photonics, or metaphotonics. In metallic systems, the resonances are associated with localized and propagating surface plasmon polaritons, whereas dielectric systems are underpinned by Mie resonances. The Mie-resonant metaphotonics (also called "Mie-tronics") employs electric and magnetic multipolar modes excited in high-index dielectric nanoparticles and their lattices--dielectric metasurfaces. In this talk, I will discuss the fields of metamaterials,  Mie-tronics, and also mention more recent advances on metasurfaces.