China will keep getting most of the hashing power as long as its profitable to do so, and this coupled with the fact that no one is still competing against them will keep making the China monopoly bigger, but Andreas says that we will see new technology developed that will decentralize mining again.
well of course they will do that, I mean it is a pretty rich country that can invest a lot of money into mining first of all because they can easily get nearly free power besides that they can create their own hardware, though I have to argue that it is controlling bitcoins, even though they have a lot of impact bitcoin is controlled by everyone in the world who owns it and that's how it will always be.