At that point it will be good to remember that many thought a stateless function was conscious.
I think it might be possible to make conscious machines, but just as basically every human recognizes humans as conscious when we have a conscious machines we should expect basically every human to think that it is obviously conscious. So at that point there will no longer be a discussion, we might still not treat it ethically like how we don't treat animals ethically, but people will recognize it and then it will be a discussion what is ethical to do with such beings.
I think it might be possible to make conscious machines, but just as basically every human recognizes humans as conscious when we have a conscious machines we should expect basically every human to think that it is obviously conscious. So at that point there will no longer be a discussion, we might still not treat it ethically like how we don't treat animals ethically, but people will recognize it and then it will be a discussion what is ethical to do with such beings.