Anecdotally, I've seen plenty of managers subjected to their own set of metrics. They might be able to resist it longer, but the equity owners aren't going to just give them a pass. It's always a question of will the benefits be worth the cost, and as soon as it is, the axe will come down.
I don't agree that creative workers have similarly easy to verify metrics, even now. However, with the ability to broadly track information, what is now possible is to view the distributions of output so that over time, an individual loses the ability to provide excuses, because chances are if your constantly in the tail end, then it's probably worth it for the organization to be rid of you.
I would love it if could apply this transparency to our governance, but obviously those with power will oppose it, and those without will have to fight for it. It's just the nature of things. Obfuscation makes it easier to arbitrage (make excess profits, i.e. have more power than others), so it is to be expected that should continue.