If Eva can use AI to create art then updates may happen much often then once or twice a year:
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It's not there quite yet to the point of having a consistent style. Ideally it'll get to a point where you can upload a variety of photos of a certain art style, then a variety of images of a specific character defined by the program with face, hair and body proportions and features, then a photo you want to replicate using that character (or characters) with the defined art style, assigning a character to each person in the photo (or, hell, even stickfigure drawing) to match the positioning.
Maybe in a few years, though you may have to pay out the ass for the services until they can properly get jailbroken/pirated.
I'm sure the tech exists now, though not in a way accessible to the general public, figuring out the best ways to monetize to the highest bidder (starting with film studios, ect) + with a bunch of lawyers & public relations looking through potential legal/ethics concerns. Technicians are likely also still needed to customize the programming to fit the individual project's needs & the programs' quirks, till the technology becomes a more robust one-size-fits-all tool.
Currently the only ones accessible to the gen public generally have a fixed set of pre-existing styles, focus mainly on stylizing the face, and/or warp inconsistently from shot to shot. Guess you could make a game with that, but imo it would grow tiring from a viewer perspective, like a bad art project (of which there are plenty of on this site already). With currently available technology, I'd find it about as off-putting as those html games where the model keeps changing or like another bad Daz3d game taking place mainly in uncanny valley.