Few features have promised to revolutionize the way we interact with our Apple devices as much as Siri, the company's ubiquitous virtual assistant. Launched in 2011, Siri was introduced as heralding a new era in human-computer interaction, offering an intuitive voice-controlled interface for accessing information, scheduling appointments, sending messages, and much more. The vision was grand: A personal assistant in your pocket, capable of understanding and acting upon a wide array of voice comm...