ChargeSpot is a wireless charger that is friends with both PMA and Qi standards
Along with the obvious simplification of wireless charging in a standard-separated world, ChargeSpot's creators claim that the device is very efficient – outputting 5W of power, it should charge your phone with almost the same speed as your wired charger. They've also included an automatic on-off tech, which does not allow the charger to accumulate any phantom usage, when there is no device to charge.
In order to help venue managers follow usage, ChargeSpot has a cloud monitoring system, which displays data on how much each installed device has been used.
It would be nice to see this multi-standard support adopted by more charger makers. In a perfect world, your choice of coffee shop should not be predetermined by its support for your phone's wireless charging, but by how juicy its doughnuts are.