I'm not sure I would class some of those countries as 'major' ... but there is a general sense now that bitcoins are leaving the USA, and at an accelerating rate.
I also think same as you not sure if many country participate in situation but i predict someday bitcoin make global function in all country because its used in transaction and in paying also
I think right after one of this "major" countries will accept bitcoin on government's level other countries will follow one by one to not stay on the side of progress. I have heard that Russia plan to adopt bit coin in 2018 year. As always they want to be first, but we will see what kind of results it will bring to them.
In Russia, the situation with the cryptocurrency remains incomprehensible. And all plans remain only plans. They have long been trying to pass a law on the cryptocurrency, but they have not yet accepted it.