macOS's gaming story has always been pretty abysmal. They nuked a ton of games when they dropped 32-bit support, and they refuse to implement the graphics API that the gaming industry is standardizing around. I don't foresee any improvements in Mac gaming from this announcement.
> But now games like Fortnite, Minecraft, PUBG etc. that already exist on iOS can natively run on the Mac. So I think that's a pretty big thing
With touch controls on non-touchscreen devices.
It isn't big.
I think the fact they chose to show off a fairly poorly running version of Tomb Raider as their demo goes to show that they still fundamentally do not understand the gaming market.