I'm not a gamer, but I thought the hardware issue with AAA games on Macs wasn't that lower-end Macs lacked dGPU's. Rather, I thought the hardware issue (in addition to cost) was that the higher-end dGPU Macs didn't offer what AAA gamers wanted/needed: the option to have the fastest gaming GPUs (e.g., Nvidia 2080Ti and other Nvidia flagship gaming products), and the fastest overclocked Intel "extreme" processors. Even when Macs came with NVIDIA GPUs, they never offered this sort of hardware, because Apple has generally wanted to limit TDP to keep its products thinner and quieter.
If all AAA games required a 2080Ti, the gaming market would have been laughably small. Check out the Steam hardware survey, most gamers out there have a 1660 or lower class GPU. The high-end GPUs are more of a symbol. They are exceedingly rare in the real world. Speaking if CPUs: Macs always used fastest available consumer processors. So there is no problem here.
The real issue is that it has been really difficult to make games with predictable performance, especially if you are looking at more demanding titles. Mac OpenGL drivers are poor quality, badly optimized and unpredictable. And given historically low-end GPUs in popular Macs there was very little financial incentive to make high-end games for the platform. Metal did improve the situation, but the issue if poor quality drivers remains. GPU manufacturers simply don’t have the pressure to deliver good drivers for Apple - it doesn’t change their sale numbers.
So are you thinking that AS will now offer that kind of hardware performance? If it does, I think that would help make the Mac an exciting platform for AAA game developers.
AS will be faster, have better drivers and will be able to deliver predictable performance. I expect AS Macs to match lower-end to mid-range gaming laptops in this department. Whether this will be enough incentive fir game developers, we’ll have to wahr and see.