My feelings is that, if ever, Chinese persons can master English without an accent, then they could take over positions today held by native Englsih speakers.

Otherwise, no way Jose, they will loose "face".

Well your first mistake would be saying well educated. If they are educated abroad then maybe it's a different story. I think it's not a problem with them to take jobs back with a knowledge of English because most expats here are working for Foreign companies that they worked for in their home countries and would'nt hire Chinese even if they had the opportunity to do so, what I do see is that the foreign companies are leaving for India and Turkey to get away from paying taxes, and higher salaries for Chinese workers with poor quality. In Shenzhen, they have seen a movement of 6% of companies leaving for other countries. Honestly, if you pay Chinese more than you still get crappy quality, so why not move.

There will always be a demand for foreign workers in China whether it will be in the professional service to the classroom.

We have capabilities that Chinese people just don't have and vice versa they have capabilities that we don't have. 

It is all over the world not just China. Foreigners working as call centre managers in India they just don't have the knowledge or culture skills to run a call centre.

Further to this if you do work for a MNC (including Chinese people) the chances are you might be called upon to work abroad to enhance your career and gain experince in your field not  to say Chinese or any of the countries people can't do the job it's just the way companies work.

I dont see typically-foreign held positions going to chinese any time soon. Its not just about the language barrier, that is just the most obvious one.

Its also that people from other countries think differently than chinese. So having foreigners here that learn the chinese way of thinking can bridge that gap. And that gap is really wide.