I have played with around with it. My first thought was that for anyone that creates digital art, they have just unlocked easy mode for their creations. The only limiting factor is their imagination and how well they learn to phrase requests to get what they want.
For anyone that creates art, it's an amazing way to get what's in your head into a visual form if you want a reference pic for ideas you have. That makes it a massive time saver.
It still relies on human imagination to produce the images, so to me that makes it a valid art form. There is talk about royalties being paid to artists because their style may be used by the program in generating the piece but maybe thats just the leeches talking.
Art has always been about absorbing inspiration from other artists and producing something uniqie.
'Steal like an artist.'