Samsung has announced Bixby, its artificial intelligence assistant, ahead of the launch of the Galaxy S8. It's expected to be one of the phone's biggest new features, and Samsung hopes it will trigger an enormous shift in user behaviour. As has been rumoured, the upcoming Samsung Galaxy S8 will have a dedicated Bixby button, which users can push in order to launch the voice assistant. Bixby is designed to make Samsung's devices more "natural and intuitive" to use, according to the company. It will initially only work with a handful of pre-installed apps, but Samsung says it will support almost every task the app is capable of performing, entirely through spoken commands.