Well, it is locked in yes.
Could the miners pull out and not activate it? That remains to be seen. They could completely do a fake on us all and crash it hard. They probably won't though.
It will be done sometime in the next day or two.
We will see!
BIP91 LOCKED-IN
229 blocks until rejecting non-SegWit blocks.
https://www.xbt.eu/I don't think the miners would do such a thing. Want benefit will it bring? They will just crash resulting to investors losing trust in the bitcoin technology.
So here comes the question... What will happen in the future, if the 2MB block size also becomes incapable of handling all the transactions? I am asking this, because the number of users have risen by many times during the past 2 years. We can expect the momentum to be maintained in the near-future as well. So what will happen if the problem with delayed transactions and high fees occur once more after one or two years?
Then we will have the same situation all over again. Drama, FUD, Debate and Civil War. Well, let's just enjoy the ride for the next 2-5 years or so before seeing it again. Hah, the soap opera will continue again.