Comment by matt_s

Apple is absolutely into the mature company phase if what they are coming up with is essentially a different bevel on buttons that "makes apps and system experiences more expressive and delightful". They are the IBM of the 90's at this point, way overvalued stock, not much room there for growth.

Setting that aside, video game visuals serve a different purpose than application UI widgets for menus, forms, buttons, etc. In a video game there are different reasons to highlight objects in a game world and relative to other objects and their movement or ability to move/interact with them. Objects in a game world might have their own light source, move in different ways so that the player knows its something they can interact with. If you look at open world games there are a lot of things happening visually in varying degrees of grabbing the gamers attention.

In a UI that is task oriented, like operating systems for PCs or phones, there needs to be less visual clutter, its not a game. It should be obvious to massive numbers of the population what function a UI element serves and accessibility standards come into play because often these OSes are used in corporate environments which should allow for people with different visual abilities to do their work.