IMO, having such an interface completely eliminates the need for us to have the hardware in the first place. I don't think of a brain computer face as a one way

IMO, having such an interface completely eliminates the need for us to have the hardware in the first place. I don't think of a brain computer face as a one way device, but two way. The reason we have a physical phone is because you need to hold it up to your ear, your eyes need to read the screen, and the fingers need to give it commands. If we can solve for the bi-directional communication then the phone just becomes a tiny little thing that sits in your pocket to facilitate connectivity to your brain and to the wireless network. Anyway, I agree this is far-fetched given the current state of the tech, and I think your skepticism is certainly well grounded, but I think we will make advancements in that direction. To me it feels like the natural evolution is to gradually get rid of personal device reliance... I think in our lifetime we will see the first steps towards this.