Voice input and control is the next human-computer frontier. The largest vendors are investing in conversational platforms; at the same time, smaller, well-funded players look to drive disruption. In the coming two years, this crowded market will see increasing specialization to drive market differentiation. It will also see significant acquisition activity, raising concerns about the long-term viability of vendors and their platforms. This report helps application development and delivery (AD&D) pros align their requirements with vendor market positions and strategies.