Apple makes a lot of money from games on iOS, but nobody would say the iPhone is a gaming device.
I expect the headset to be the same: it will have the GPU power to support games third party devs will make games, Apple will make money from distributing games, and it will still not be considered a gaming platform.
I disagree, I consider the iPhone to be a gaming device. By many metrics it might even be the most popular gaming device ever. It's not only a gaming device, but it can be more than one thing. That said, I suspect that the price tag on this generation of the Vision is probably gonna shut out most casual users; maybe we will see marquee, platform-selling games on it in later generations but I have a hard time imagining many people buying it for that until they become more affordable. I suspect that this will be a hard sell to the crowd that has $3K to spend on a gaming device (which granted, lots of people who play PC games spend that much), so it may be a chicken-and-egg problem.
That said, having used Hololens 2 and Magic Leap I saw the potential for AR to be something really cool. I'm certainly rooting for Apple to finally deliver something polished and compelling, both for professional and consumer users.
I suppose it's a specific thing. I'd say "gaming device" means heavily optimized for gaming, including tradeoffs that make it less attractive for other scenarios. Consoles, Nintendo Switch, wired mice with a billion buttons and 1000DPI, etc.. those are gaming devices to me.
I expect the headset to be the same: it will have the GPU power to support games third party devs will make games, Apple will make money from distributing games, and it will still not be considered a gaming platform.