After thinking about it for a few minutes, in the end it probably would have meant Tokyo getting nuked in late 1945 or early 46.
Maybe, but any kind of extended conflict with the US on the defensive all the time would have drawn a lot of resources away from the bomb development effort. And if the extra time allowed Heisenberg to remedy his error on the graphite purity problem, the Germans could have made it further down the path to developing their own bomb (either that or replace the heavy water supply from Vemork with a more secure production source).