It might "work", for small values of "work". With a big emitter, at moderately short range, and a receiver on the back side of a laptop screen, it might work. Modest sized conference rooms with art on the walls, for example. Small classrooms. Maybe even a Starbucks.

Emitter panels on the ceiling could charge mobile devices placed face-down for charging. A car-based system could charge devices of people using phones while driving, if you had enough short-range emitters around the car.

The line of sight limitation, though, makes it only slightly more convenient than a power cord. The electromagnetic charger people have the same problem, but they're mostly thinking "put mobile devices on charging pad on bedside table", which works but isn't selling.