Well, the one exception would be that Germany had no conquered anyone in 1939 (I'm assuming we are speaking of before the war started), so there would still be some significat resource shortages. And this again goes back to Hitler and the german planners- they did not see any need for increased production. Until the war in russia, germany had no need for extra resources and an increase in production.
But if they had foreseen this in 39, and increased production, I'm not sure. that makes a good what if. Hitler (We'll have to disagree on him- I don't think he was any good as a strategist) may not have been so fixated on resources, which could have altered some of the decisions he made. With more equipment and transportation available, the first year of the war in russia could have turned out differently...

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Seriously, all today is missing is free cotton candy and the annual Bay State Hooker Parade to make it any better.