I've used it for portraits to use in Foundry, particularly the Theatre Inserts module, because having faces of *some* sort on screen to correspond with characters does a lot to help everyone keep track of who is who. I don't particularly trust it with actual writing, though. Using it to generate names seems doable, though there's plenty of more tradiional name generators that can actually pull from Golarian lore to get lore-friendly names. Dungeon Alchemy as a program seems interesting as that's probably the only way I'd bother with 3D maps, a way to quickly b!~!$!&$ battlemaps, but I'm not entirely sure how much of that is "AI" versus having a reasonable handmade algorithm for defining room types and making sure things like food are placed on top of plates. I enjoy making maps in applications like Dungeondraft so I'd rather spend the time to make something that's actually designed to be fun to play in and has a bit more thought put into the visuals, but I can see someone wanting something prettier than older dungeon generation tools.
Basically, it's not great at anything, so its applications are gonna be limited to when the alternative is gonna be even worse, like my shaky hands trying to draw something. That works out pretty well for home games, but obviously nobody wants to pay money for something an "AI artist" made (and then there's the broader issues of companies salivating at the thought of not needing to pay artists, or at least holding AI over their heads to argue for lower compensation).