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It's not just gaming that will be affected, though. Any other app that currently runs on mac will need to be recompiled in a separate source code. That means TurboTax, Office, OpenOffice, Firefox, Chrome, and everything else will need to resubmit their code if they want to be available in the app store.

This is, of course, assuming that Apple allows apps to run that are not available in the app store. I'm going to go out on a limb and predict that they'll try and lock it down, much like what they do with iOS. That way, they're able to prevent malware in apps. But then again, they'll also be able to deny people they don't like. Gab ran into this issue last year. They're currently suing Google over the same reasons, though I suspect that's due to it being a stronger case than with Apple. But that's a whole 'nother story for a whole 'nother conversation.

That's exactly what I'm worried about. Your point on the app store is worth watching out for too. In my case its because some of the apps I use aren't even on the app store. Well at least 2020 is still a few years away.