Both, Bluetooth and WiFi, use 2.4 GHz band, so i wonder if streaming music from my iPhone/iPad to a Bluetooth speaker wouldn't cause interferences? Especially when already streaming music through WiFi (like iTunes Radio)? Why are there even devices on which you can turn on WiFi and Bluetooth at the same time if those two technologies don't like each other? In times of WiFi Direct, why does Bluetooth even still exist? Oh, and will AirPlay Direct ever come true?