Under two important scenarios - the remaining EU members, including the UK, join EMU by 2020 or else the recent depreciation trend of the dollar persists into the future - the euro may surpass the dollar as leading international reserve currency by 2022.
2022 is not exactly "soon". But then, you can't rely on economists' predictions, so we're back to guessing anyway. "If you know your enemies and know yourself, you will not be imperiled in a hundred battles." Sun Tzu
In the transition scenario, its not smooth at all. "If you know your enemies and know yourself, you will not be imperiled in a hundred battles." Sun Tzu