Plenty of offices will just adopt western hours, like west coast offices do for east coast hours, and plenty of managers will be fine with the dirt cheap shippable code coming out of eastern Europe and Africa in the next few decades as worldwide internet access improves.

On the other hand, I have read about a growing interest in returning to the office. A growing number of people are feeling unproductive working from home. A company could position itself towards shareholders as more productive and innovative with more butts in the seat than it's competitors who outsource. It will be interesting to see how this shakes out.