Oh, this is neat :). I was recently thinking about how to configure something on an ESP8266 from my phone - with the ESP potentially being out of range of the WiFi; so HTTP or attaching the ESP to my MQTT server will not be a reliable option.

I was afraid I had to write an Android App to connect to the device via Bluetooth, which sucks because I am neither an app nor a java dev. With the web BT functionality I can now put a simple interface somewhere on the web, open it on my device and control the ESP (I am not a web dev either, but simple JS toy stuff is easy enough).

Of course this might require swapping the ESP8266 for an ESP32 if BLE is strictly necessary (the former doesn't support BLE, afaict).