The article starts talking about professions where working remotely allows to service more or in fact all possible customers in the world at once (e.g. musician

The article starts talking about professions where working remotely allows to service more or in fact all possible customers in the world at once (e.g. musicians, teachers). That is not the case for programmers, consultants and contractors (or more precisely, the Internet already had that effect for website/app/SaaS builders without need for remote work). What will happen for them is that employees from poor countries and outside main cities will be better able to participate, increasing work offer, but also it will be easier for businesses outside main cities to find workers, increasing work demand.