Note, you can still use the “Video Games, Consoles & Accessories” and “Online Games & Puzzles” general categories or their subcategories to block ads from video games, online games, and downloadable games if you believe these types of ads are unsuitable for your users.

Literally no story here at all. They’re moving the block from one section to another. Google implements OpenRTB which has a field in requests for blocking arbitrary IAB categories