Many many many years to come before it becomes an international accepted currency, probably not even in our lifetimes, but I hope so though.
Yes bitcoin is a digitial and New currecny. See whats happens with FIAT Currencies.
Even the super power nations could not make the Euro work for more than a novelity. It is still there, but I can easily walk into the countries that adopted it and use their local currency and be more accepted than dropping a Euro two miles from the airport.