Agree with this. We still live on a paper world and people want something to hold on to for them to believe its real.
5 years is still a maybe to make it worldwide. Problem is technology. Not all countries can manufacture some machines that are high ends. They will need funds to buy it in other countries and that will take a lot of money and risk.
They will also need the people to agree for they will use the tax that is being paid.
At the end of the day it is every government which will decide and whom can make good changss first.
Japan doesnt have a problem with it so they didnt have a hard time deciding.