I can see them having the ability to link a wireless controller for hardcore gaming like you can to Apple TV (and of course iOS devices).

For everything else games could use hand tracking with a similar control scheme to Kinect and Wii attempted.

In an interview John Carmack did with Lex Friedman recently, one of the things that Carmack pointed out is that VR games such as Beat Saber were a perfect fit for requiring a controller since it was natural to move and slice through something without significant physical feedback (at least as represented in the game).

However, most VR games that require a controller for VR interactivity with "real world objects" tend to fare less well as they create a cognitive dissonance between the actions the player is taking and their perceived results. Anecdotally, for the few VR demos I've tried I agree.

You might as well write “Not having a keyboard or mouse will be pretty limiting for gaming” fifteen years ago before mobile gaming took off.

Yeah, it will be limiting for the preexisting games built for preexisting VR systems. It will also be perfect for the types of games people envision and build for this generation of device. Not recognizing that seems more like a lack of imagination on your part than a failure of design on Apple’s.