It's a mistake to think of "voice" as another interface, warns Phil Wainewright. That's like comparing the early ASP days to what cloud has become: As the history of data center servers has shown, going headless is just the first step on a long journey of increasing disembodiment. Conversational computing is a twenty-five year reset in UIs that will shake up enterprise computing. Phil also sees a fresh opening for messaging systems like Slack. On screen, a messaging layer can be a distraction, but if you're an enterprise worker talking to your interface, who cares what bot is listening as long as they deliver the right service?