The old saying, "be careful what you ask for," applies here. Understand that if Apple is successfully convinced to focus on gaming, you will sacrifice many of the things you love about Macs right now.
Thing is, I don't think they need to change focus, and they've been focused on the things required for gaming for a good decade at this point, they've just been held back by intel hardware, vs. the devices they want to make.
Apple could do basically zero additional work vs. what they've been doing since roughly 2014 when they introduced metal and they will end up with more and more games on macOS. Why? Because the CPU and GPU architecture across iPhone, Mac and iPad is now unified, the software APIs are unified to the point where iOS apps will even run on macOS.
They do not need to divert any resources at this point, it's already all there. The only thing holding stuff back has been hardware, and now that's fixed.
All this also feeds into AR/VR. Unless you've been living under a rock and ignoring every other thing Tim Cook says about what he finds exciting, all this software is coming together for AR. Which shares a huge amount of tech with 3d gaming and VR.
I'm sure some here will cry about how PCs have better ultra high end gaming hardware. It simply doesn't matter. The switch is the best selling console right now and it has low end hardware from 2017 in it. What matters is software and with the iPad, iPhone Mac and AppleTV all sharing a common platform, any game developer would be insane to ignore developing for that shared platform. You're talking hundreds of millions of active devices.