OS X is less of an entertainment platform than Windows ... when you look at the fact that games are still almost always released for Windows only/first.
OS X was and still is a platform for creating, iPhoto, iMovie, iDVD, iWeb, and I would even go so far as putting iWork into that same category. Windows has Windows Movie Maker but it doesn't compare to iMovie in terms of output and the kinds of things the average user can accomplish with it.
I think you are both missing the point. The author is trying to argue that Apple are removing features and "dumbing down" the OS, to make it easier for casual users to use it as an entertainment hub.
There's also a lot more to entertainment than games. iTunes is the dominant media application, and it's so much better on OSX than Windows. A lot of people consume their entertainment online nowadays anyway, my kids are growing up that way.
Between Steam for Mac and the Mac App store availability of top tier games on the Mac is excellent and getting better all the time. Can't play Far Cry 3? Oh well, I'll just play Portal 2, CoD Black Ops or The Darkness II instead and there are scads more.
+1 for your point about creating though. Both my kids are very musical and are playing with Garageband on the iPad already, and when they're a little older it's there for them on the desktop too. My eldest is getting into photography as well and while she may well outgrow iPhoto at some point, it's hard to imagine a better way to get started.
But then I'm squarely in Apple's largest target demographic for the Mac. That doesn't mean the mac is only for home users though, any more than Windows is only for gamers and Enterprise users. It's just that those are their particular strengths.
OS X was and still is a platform for creating, iPhoto, iMovie, iDVD, iWeb, and I would even go so far as putting iWork into that same category. Windows has Windows Movie Maker but it doesn't compare to iMovie in terms of output and the kinds of things the average user can accomplish with it.