Games are different, though. They don’t play as part of the ecosystem; they run full-screen and do their own input processing and use no system widgets or controls. They essentially take over the lowest level of hardware they can get access to, and in many ways once launched would be indistinguishable between the various platforms (quirks and rendering idiosyncrasies aside).

How are they different?

Awesome trackpads, and cohesive hardware from a single maker vs a massive ecosystem of different arrangements of components. Different ethos imo.