
Magnetic accessories are designed for MagSafe, Qi2, and Pixelsnap ecosystems. All phones that support these features also support wireless charging, and there is a general understanding that magnetism benefits those who want magnetic wireless charging accessories the most.
As useful as a magnetic wireless charger is, it is not the only reason to want native magnetic support on a smartphone. I frequently add magnetic ring adapters to devices that don't support wireless charging at all, and it has been a game-changer.