Voice UI has emerged as a viable technology, but its usefulness depends on the context or "place-ona" in which it's used. Voice won't replace existing technologies like touchscreens, and instead complements them. The current speed and accuracy limitations of voice UI make it less suitable for tasks that require rapid input or processing. However, there are scenarios where voice is particularly useful, such as driving or playing music while walking around the house. As audio processing technology improves, voice UI may become more effective in these areas. The development of true multi-modal messaging systems, which enable seamless communication across different contexts and interfaces, holds promise for the future of voice UI. Ultimately, voice UI requires careful design and delivery to unlock its full potential and provide a valuable user experience.