Apple wouldn't need to add a beacon to devices like phones, tablets, or laptops. They already have Bluetooth. The problem is that Bluetooth is usually turned of

Apple wouldn't need to add a beacon to devices like phones, tablets, or laptops. They already have Bluetooth. The problem is that Bluetooth is usually turned off and when turned on is not discoverable. Manufacturer could easily add software that regularly turned on Bluetooth and sent out a beacon. With Bluetooth LE, it wouldn't use much power. The Bluetooth MAC address could be the identifier. Also, Wifi can be used as a beacon. Wifi is usually turned on and broadcasts message to discover known networks.