I just restarted studying and playing Go after a long break. I have to admit that Alpha Go`s win`s against Lee Sedol and Fan Hui unconsciously demotivated me... although it took me some time to accept that.
But... actually it is not that significant for my love / appreciation of the game. Compare to other sports: running, lifting weight etc. the fact that a machine can climb a mountain much faster or can easily lift tons of weight... or speaking about more abstract things... can calculate complex math-tasks in milliseconds, does not make it less interesting when people training to lift weight or try to calculate without the help of a calculator.
The game itself never changed, it is still alternating black and white moves on the boards, there are only now some stronger players around.
But yes, coming back to the topic... Alpha Go`s win was generally perceived as a demystification of GO, bringing it down to hard facts, wich are able to be calculated. No more esoteric mystery here. Edit: That is not a big marketing clue: "hey we have something here wich was regarded as beyond computer knowledge, but it is not ... but it is cool!"
When i started with Go, i did liked to think of GO, as being complex like playing 4 or 5 Chess games on one big board, you have a lot tactical battles on the board going on, and at the same time you should make some strategical decisions how to let the battle-fields - kind of - work together.
Even while i like Go more, i like to play chess a lot. I have no problems with the fact, that computers are better at it.
To make a much to long story short: I think i was sad when Alpha Go won because it proved that Go is like Chess, not a mysterious / esoteric game, and some unconscious part of me did like to think of GO as something mysterious/spiritual beyond pure logic.
But now, after i accept that GO is in fact nothing more than logic, i`m fine with it.

Ah, and here is a related interview:
"Ke Jie wants you to know weiqi is fun -- and easy to learn"
https://youtu.be/OCevCII1zo0