By definition it is art. Digital art?
In a way it was made by humans, so it is human creativity that brought it to life. Somebody had to program the AI and make a mechanical drawing table that it can use. The image wasn't printed but painted, am I right? If we could go back to the ancient times an find someone carving hieroglyphs in stone, he'd probably call it art. But if we took out a spray can and painted a graffiti nearby, he'd laugh at it and call it a meaningless blob. Times change.
In ancient times, humans were carving hieroglyphs, humans now use a spray can and paint graffiti. This one is an AI. Although beautiful in some way, this one in the news was made by a machine... no imagination, just numbers...
On the other hand, you could say, that AI painted picture can be considered an "Art", because that AI was, at some point, created by a man, which had his own objective views on the subject.