Either that or results-based work doesn't actually help us get things done faster than traditional work (_i.e._ it's snake oil) and at best it'll limp along providing little benefit to anyone but the people selling books about it.
So either it will fail/stagnate because it doesn't improve productivity, or it will become the new norm and we'll just have enough results expected of us that the effect on workers is at best indistinguishable from traditional work (businesses that fail to fill up the free time with more work will, generally, lose to those that do)