33 Million Voice Assistants by End of 2017 in US

2017 Platform Innovation Predictions:

• One or more of the platforms will enable direct person-to-person communication.
• Both Google and Amazon will release push notifications to proactively alert
  consumers of new updates.
• Google will introduce a compelling personal productivity offering, based on G Suite (Gmail, Google Calendar).
• The platforms will enable at least two monetization capabilities. Expect 2017 to be a year of small wins for monetization, as momentum builds for a big 2018.

Source: VoiceLabs