Gary has his perspective
Gary Kasparov wrote a piece on this in a recent New Scientist. He was hoping that the human would win this time but was of the opinion that Go would soon succumb to the machines. He said he got a bit flustered (my words) in one game of chess when he played his famous series of games and the machine nobbled him (my words again). He points out that a halfway decent laptop with an open source chess program will thrash any human grand master these days.
It was a well written piece and worth reading but you'll have to register (boo) https://www.newscientist.com/article/2079162-garry-kasparov-weighs-up-ai-challenge-to-worlds-best-go-player/