In case no idea what Duplex is:
I for one, don't care, talking to a robot, whether I know or not, as long as it gets the job done, can convey the thoughts in a manner that is complete.
Heck, we "talk" to Siri, Google Assistant and Alexa everyday.
Google's Duplex is more like the other way round, where the Assistant rather initiates the conversation, and does it so well, it's human-like.
Is it ethically wrong? What are the moral implications?
Should such robot's 'disclaim' themselves at the very beginning of such calls?
Are you likely to pick a call by a bot if you know it's a bot, and the bot tells you, it's a bot?
And just a fun scenario:












I would say yes. Having a quick discussion with my brother about it I came up with the scenario of the Google AI being used to call businesses constantly to set up fake appointments.
A simple solution to this is to make the AI start the conversation like "Hi, this is Google Assistant calling on behalf of Joe Smith, I would like to make an appointment for him please".
Human on the other side knows it's an AI and can answer accordingly. Doesn't need to pretend to do formalities, can simply state fact. Both efficient and fair to the person on the otherside.
I also would say it is important for AI to be as humanised as possible, as we can all agree standard computer voices are annoying and most people would just hangup.