'Your argument is as morally repugnant as racist arguments' as a response to 'I don't think machines will ever capture human aesthetics or emotions' is ridiculous, glib and ugly.
No, it's not anything for grandchildren. Right here, today, someone tried to draw some moral parallel between racism and someone else's views on the possible limitations of AI. That is totally effed up. It's totally effed up whether or not the original thing about AI is right or wrong.
I disagree with the "relatively near future" part, but rest assured, AI rights will eventually be a thing.