According to Gartner the market for what it calls virtual personal assistant (VPA-)enabled wireless speakers is set to to boom from $360 million in 2015 to $2.1 billion in 2020, with 3.3% of households adopting such a speaker by 2020.
"Last year, the VPA speaker market essentially consisted of end-user spending focused entirely on Amazon Echo, a wireless speaker with an array of embedded microphones to capture and respond to users' far-field voice commands for Amazon's VPA-- Alexa. Later, Amazon introduced the Tap and Echo Dot," the analyst says. "By 2020, competitors' products and third-party implementations of leading VPAs (Google Assistant, Apple's Siri and Microsoft's Cortana) will likely have ramped up."
VPA speakers, especially wall-powered ones, allow for customers to own and install multiple devices around the home. The value of such speakers comes from ease of use and the intuitive means of interaction, and if all household members recognise such value it will drive the desire for terminal access throughout the entire house, and not just one room.