Actually no .. When and how do they win? if by taking out france, and the UK bow out, you will then have an escalating cold war in the long term.
The Soviets will also continue to build up as well, this will in due time cause a cold war as well.
So lets assume that its Germany with a subservient grance, benlux, Denmark, Italy and spain at its disposal. you have a somewhat usable economy that could be continued.
looking to the east.. Poland will become a fairly empty place. agriculture..
if the soviets don't collapse then it will stagnate the economy long term.
IF the soviets do collapse then the germans will need to occupy it.
economic collapse.
what will it look like
In central Europe, factories, mining.. in Poland, mining, farming.. in france.. well what they did in france before
if the Germany Reich has to pour money into occupation and extermination camps and a cold war, its just going to be ugly.
Poles and other slavs will be used as cheap labor.
In the west, it will just be business as usual.