Counterpoint: "Xi Jinping Has Quietly Chosen His Own Successor" http://foreignpolicy.com/2017/10/20/xi-jinping-has-quietly-c...
I guess these predictions are not necessarily contradictory, because by picking one of his own as General Secretary he would retain a lot of influence (in the extreme case he might effectively retain all power, like when Dmitry Medvedev was President of Russia in 2008–2012). In any case it will be interesting to see what happens.