Wouldn't write that off altogether for longer values of "eventually". The current government's political legitimacy is in part tied to delivering economic development. But obviously rapid exponential growth can't continue forever. After that levels off (and with incomes/education/institutions etc more developed), it doesn't seem unthinkable that some sort of political reform will need to be on the table again in order to maintain legitimacy. Maybe not from Xi Jinping, but he's 66, he won't be president of China forever.