> What does Apple silicon mean for the future of gaming on Apple hardware?
It is definitely the death of gaming as we know it on PCs.
Blizzard didn't bother porting Overwatch to macOS, their latest engine, and even that game was released in 2016. They ported to the PS4. It's just too small of a market.
Nintendo Switch level games should port fine, many are developed on cross platform engines like Unity that already support Metal on iOS. However Switch games sell for $50+, already higher than PC or macOS titles, so it's usually pretty bad economics - you'd rather the user buy on their Switch than their Mac.