First off, it solves the problem of not having to deal with a ton of platform specific apis. See https://kyle.machul.is/2016/11/07/talking-bluetooth-le-on-deskt

First off, it solves the problem of not having to deal with a ton of platform specific apis. See https://kyle.machul.is/2016/11/07/talking-bluetooth-le-on-desktop-in-2016/ https://kyle.machul.is/2016/11/07/talking-bluetooth-le-on-de... for more info on how much fun that is. If you want specifics, it's great for Bluetooth enabled adult toys. We haven't been seeing much in the way of non-mobile software for toy control, and webbluetooth makes it much easier to write the same code for all platforms. I've written a demo for controlling the lovense Hush via Webbluetooth in Chrome 54, and while the message round-trip time leaves something to be desired (at least on os x, where it's 150ms or so between messages, which means trying to send vibration patterns doesn't work very well), it does "just work" at least.