Well, no, just a little playful ribbing since what that OP imagined was what Java was intended to actually be.
Apple going "all in" on the gaming market wouldn't be Apple creating some magical graphics library or IDE that would make games work on iOS, Mac OS X and Windows: it would be Apple making a push for games in the living room with Apple TV, making a push for quality games on the MAS and the iOS App Store (as opposed to the scam-laden mess they are now), and making a push for game development/consumption with laptops/desktops featuring top-of-the-line graphics, optimized gfx drivers, a good, well supported IDE with a developer-friendly corporate stance on the level of Microsoft, and a modernized, up-to-date implementation of OpenGL.
Given all of that, it's simply not in Apple's self-identified best interest to do this. Games simply aren't important to Apple. And from a purely objective point of view, I don't think it should be. It's mobile computing which is driving the market and driving product trends for the future, and it was Apple's stubborn persistence to this which led to the MacBook Air, the iPhone, the iPad, etc. And the result is that it's made them a lot of money, while the rest of the industry has been scrambling to catch up on all fronts.
If we want gaming to be significant on the Mac, we shouldn't rely on Apple to do it for us. If anything, we should be looking to the indie scene and places like Kickstarter and the Humble Store/Humble Indie Bundle to raise the profile of Mac gaming.