One interesting note, which may mean absolutely nothing: The artwork on the invitation closely resembles the drawings associated with its Google Now automated personal assistant on Android.
Google also does similar things with Google Now, its smart assistant feature in Android, which can do things like remind users when they should leave a location to make an appointment.
With Nina, companies can quickly add speech-based virtual assistant capabilities to their existing iOS and Android mobile apps, greatly enhancing the self-service experience for their customers.