there will always be jobs--to suggest otherwise is to engage in the lump of labor fallacy---China can't specialize in everything, nor can all the other countries, even if they have an absolute advantage over every single thing America does (which I'd put forth is not the case), we'll still have a comparative advantage in something, which ultimately means that we will have jobs which are in high demand.
You are correct! There will always be jobs of some sort just as there are in all third world countries. They will be low skill low paying jobs that cannot support the normal American life style. As more and more of our skilled decent paying jobs are sent overseas we become a nation of burger flippers manufacturing hamburgers instead of manufacturing high tech items like TVs and such. What is next are you going to advocate that we become a nation of rag pickers and that we should be thankful for having so many jobs? Becoming a third world nation and striving for mediocrity should not be a goal.