As a designer, this is an unsettling trend to internalize. In a world where computer can see, listen, talk, understand and reply to you, what is the purpose of a user interface? Why bother designing an app to manage your bank account when you could just talk to it directly? Beyond human-interface interaction, we are entering the world of Brain-Computer Interaction. In this world, digital-telepathy coupled with AI and other means of input could allow us to communicate directly with computer, without the need for a screen.
This is so logical. I remember at CES in early 1990, trying out a headset that used EEG. It made total sense to me, though at the time, all one could control was the game Pong.