I once again concur with Aj on many of his points as I have said in the past all electronic keyboards are all just smoke and mirrors, parlour tricks. The vocaloid is yet another trick to add to the bag of available tools.
For my own comments I was referring to those that play nothing but their computer to make music. While there may be a place for it, I can not stretch the definition far enough to call them musicians in my mind.
Tony I think that it differs from a vocal harmonizer in that one has to at least play a chord to get it to harmonize. With this toy one doesn't.
I do marvel at the technology and embrace what I can live with and discard what I can't, to fit my way of working and standards I set for myself, not those that others would like to set for me.