Its kind of an apples and oranges comparison, I didn't bring in the switch as an example, but the other member did and yes the current GPU is underpowered but yet its mostly a hand held device, the new Switch (which should be announced today), is purportedly capable of 4k gaming on a tv.
Yes, that's my main point, or at least one of them from my earlier post. If Apple does indeed wish to have the Mac as a viable gaming platform wanting to compete directly against consoles and the PC, then it needs a much better GPU then what is available.
As I said earlier, there are a number of obstacles in front of apple to make Macs a gaming platform, the GPU is but one hurdle. My uneducated thinking and its only my opinion, is that the prospect of profits is rather small, where as the investment to make it happen is exceedingly high. I don't see apple going full force to alter the current landscape for the Mac (at least in terms of gaming).