I wonder what this means for the classic IPs of Blizzard, like WarCraft, StarCraft and Diablo. Especially StarCraft could use an update - I would immediately buy a SC III for the Mac. Unfortunately, there was no update since SC II was ported to Metal some years ago.
There's not likely to be any more mac x86 development from anyone going forward, and I think M1 is enough of a branch that it makes it difficult to justify it.
I can understand the difficulty of Mac ports, if a game doesn't support Metal yet, but that is the case with StarCraft. In theory, a recompile might do.