MagSafe on iPhone (not to be confused with MagSafe on MacBooks, which is entirely different despite using the same name) is a good idea, in principle.
Build a ring of strong magnets around the wireless charging coils in the back of every iPhone, together with an NFC loop to identify accessories.
In addition to doubling the wireless charging rate from 7.5W to 15W, this could enable all sorts of neat accessories.
Unfortunately, the market has given us precious little to be excited about, and Apple’s own accessories are some of the worst of the bunch.
Instead of leading the way with imaginative ideas and software solutions, all we’ve got were some lackluster chargers and wallets with magnets in them.