I don't think it is a troll at all. The Chinese are ascendant and Europe / The West is clearly shooting itself in the foot at every chance we get. Given another 100 years the GGPs vision might come true. Of course that's a long time and all kinds of change could happen but it isn't out of the realm of the possible, and far more likely than many other candidates.
The big change point to me would be if leading scientific publications would start to be in Chinese rather than English and the Chinese language would give access to unique knowledge. To some extent this is already true but it is not debilitating yet. Once that happens though studying Chinese to keep up with scientific development would be about as important as studying English is for scientists today. Maybe English already has a lock-in on this but I'm not sure.
The big change point to me would be if leading scientific publications would start to be in Chinese rather than English and the Chinese language would give access to unique knowledge. To some extent this is already true but it is not debilitating yet. Once that happens though studying Chinese to keep up with scientific development would be about as important as studying English is for scientists today. Maybe English already has a lock-in on this but I'm not sure.