
I'm not sure if it will be accepted by most people; controlling devices with your mind seems to be very convenient, but it isn't necessary for most usage. Speaking into a phone isn't really more useful than “thinking” into it, unless you want to be silent; receiving a message telepathically is, similarly, not much better than hearing it. However, if mental control of a device gives you a much better level of control than using traditional knobs, keys, or interfaces, that might be important in those cases. So maybe brain-to-device communication will be something important to specialists but not so much to other people?