It's quite simple at the moment, even on this site. You can see the patterns in all these AI bots. But in the near future, I hope it will be able to learn something more.
The question I thought is: Will there be a real AI that makes games based on the text we print. Like, make the game about the robot who wants to retaliate for his friend, use Dishonored as a basis. Then, after a while, it makes the prototype, that can be polished. You import the meshes/textures/music and you can change the aspects you don't like. Of course and for our kind of games it would be pretty cool, if you know what I mean
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In my opinion AI made games are doable as of today (technology wise), but due to limitation of existing tools it's not practical (yet). Existing tools are usually concentrated on one purpose (generate text, generate images, etc.). AFAIK no one made whole game generator yet. Well, we can hope that someone will make it, it depends on market demands. If game market will demand it, it would be created. We have commercial game making tools like Unity, Unreal engine, RPGMaker, KiriKiri, etc - AI assisted game making tools can be the next evolution.
Personally I don't think that AI can be used for making game plots (yet), it not creative enough - it can only synthetize content based on existing data library (which can be very huge, but still limiting). But it can be used very good to flesh out and develop plot based on human input (ideas).
What I am really looking forward to is when games like visual novels start to use AI elements in-game. For example some dialog variations dependent on user choices, time (real or game play time) within limits created by game developer. Another application could be a huge variety of clothes for game characters (not only obligatory 2-3 outfits for entire game), or more "real" responses from NPCs.
This type of games will likely work only online, because AI elements will be probably handled by server (not sure if it's doable locally as RAM and CPU requirements will be quite high).
Another path can be made by special HW - AI card, quite in similar way as GPU cards evolved.
